use just one register_on_player_receive_fields function - that also returns properly true instead of nil as before

functions.lua

@@ -1696,8 +1696,32 @@ end
 
 -- options
 
-minetest.register_on_player_receive_fields(
-    function(player, formname, fields)
+-- route player input to the right functions;
+-- return true when the right function has been found
+minetest.register_on_player_receive_fields( function(player, formname, fields)
+	if     formname == "yl_speak_up:optiondialog" then
+		yl_speak_up.input_optiondialog(player, formname, fields)
+		return true
+	elseif formname == "yl_speak_up:setdialog" then
+		yl_speak_up.input_setdialog(player, formname, fields)
+		return true
+	elseif formname == "yl_speak_up:confirm_save" then
+		yl_speak_up.input_confirm_save(player, formname, fields)
+		return true
+	elseif formname == "yl_speak_up:edit_option_dialog" then
+		yl_speak_up.input_edit_option_dialog(player, formname, fields)
+		return true
+	elseif formname == "yl_speak_up:talk" then
+		yl_speak_up.input_talk(player, formname, fields)
+		return true
+	elseif formname == "yl_speak_up:fashion" then
+		yl_speak_up.input_fashion(player, formname, fields)
+		return true
+	end
+end)
+
+
+yl_speak_up.input_optiondialog = function(player, formname, fields)
         if formname ~= "yl_speak_up:optiondialog" then
             return
         end
@@ -1855,13 +1879,11 @@ minetest.register_on_player_receive_fields(
             "yl_speak_up:optiondialog",
             get_fs_optiondialog(player, n_id, d_id, o_id, p_id, r_id)
         )
-    end
-)
+end
 
 -- dialog
 
-minetest.register_on_player_receive_fields(
-    function(player, formname, fields)
+yl_speak_up.input_setdialog = function(player, formname, fields)
         if formname ~= "yl_speak_up:setdialog" then
             return
         end
@@ -1952,8 +1974,7 @@ minetest.register_on_player_receive_fields(
             yl_speak_up.speak_to[pname].d_id = fields.d_id
             minetest.show_formspec(pname, "yl_speak_up:setdialog", get_fs_setdialog(player, n_id, fields.d_id))
         end
-    end
-)
+end
 
 -- talk
 
@@ -2491,19 +2512,16 @@ end
 -- end of yl_speak_up.edit_mode_apply_changes
 
 
-minetest.register_on_player_receive_fields(
-    function(player, formname, fields)
+yl_speak_up.input_confirm_save = function(player, formname, fields)
 	if formname ~= "yl_speak_up:confirm_save" then
 		return
 	end
 	yl_speak_up.save_changes_and_switch_to_other_dialog(player, fields, fields.goto_target_dialog)
-    end
-)
+end
 
 
 -- process input from formspec created in get_fs_edit_option_dialog(..)
-minetest.register_on_player_receive_fields(
-    function(player, formname, fields)
+yl_speak_up.input_edit_option_dialog = function(player, formname, fields)
 	if formname ~= "yl_speak_up:edit_option_dialog" then
 		return
 	end
@@ -2580,8 +2598,7 @@ minetest.register_on_player_receive_fields(
 	-- if ESC is pressed or anything else unpredicted happens: go back to the main dialog edit window
 	-- reason: don't loose any unsaved changes to the dialog
 	minetest.show_formspec(pname, "yl_speak_up:talk", get_fs_talkdialog(player, n_id, d_id))
-    end
-)
+end
 
 
 -- identify multiple results that lead to target dialogs
@@ -2621,8 +2638,7 @@ yl_speak_up.check_for_disambigous_results = function(n_id, pname)
 end
 
 
-minetest.register_on_player_receive_fields(
-    function(player, formname, fields)
+yl_speak_up.input_talk = function(player, formname, fields)
         if formname ~= "yl_speak_up:talk" then
             return
         end
@@ -3010,8 +3026,7 @@ minetest.register_on_player_receive_fields(
                 end
             end
         end
-    end
-)
+end
 
 -- Make the NPC talk
 
@@ -3417,8 +3432,7 @@ yl_speak_up.get_fs_fashion = function(pname)
     return table.concat(formspec, "")
 end
 
-minetest.register_on_player_receive_fields( --fashion
-    function(player, formname, fields)
+yl_speak_up.input_fashion = function(player, formname, fields)
         if formname ~= "yl_speak_up:fashion" then
             return
         end
@@ -3495,8 +3509,7 @@ minetest.register_on_player_receive_fields( --fashion
         end
 
         minetest.show_formspec(pname, "yl_speak_up:fashion", yl_speak_up.get_fs_fashion(pname))
-    end
-)
+end
 
 function yl_speak_up.fashion(player, obj)
     local luaentity = obj:get_luaentity()