Fix for #1499 (#1501)

* Fix for #1499

Strings weren't correctly identified in the set variable event execution.

Author: Jowan-Spooner

addons/dialogic/Events/Variable/event_variable.gd

@@ -40,7 +40,12 @@ func _execute() -> void:
 	if name:
 		var orig :Variant= dialogic.VAR.get_variable(name)
 		if value and orig != null:
-			var the_value :Variant = dialogic.VAR.get_variable(value)
+			var the_value :Variant
+			match _value_type:
+				0: the_value = dialogic.VAR.get_variable('"'+value+'"')
+				2: the_value = dialogic.VAR.get_variable('{'+value+'}')
+				1,3,4: the_value = dialogic.VAR.get_variable(value)
+			
 			if operation != Operations.Set and str(orig).is_valid_float() and str(the_value).is_valid_float():
 				orig = float(orig)
 				the_value = float(the_value)