GDScript: consider constructors as always existing

There's always a constructor, even if implicit, especially for native
types.

Also don't check for signature match on function call, since this
information is not available in release builds.

modules/gdscript/gdscript_parser.cpp

@@ -6767,10 +6767,10 @@ GDScriptParser::DataType GDScriptParser::_reduce_function_call_type(const Operat
 				valid = _get_function_signature(base_type, callee_name, return_type, arg_types,
 						default_args_count, is_static, is_vararg);
 
-				if (valid) {
-					return_type = original_type;
-					return_type.is_meta_type = false;
-				}
+				return_type = original_type;
+				return_type.is_meta_type = false;
+
+				valid = true; // There's always an initializer, we can asume this is true
 			}
 
 			if (!valid) {
@@ -6829,6 +6829,7 @@ GDScriptParser::DataType GDScriptParser::_reduce_function_call_type(const Operat
 		} break;
 	}
 
+#ifdef DEBUG_ENABLED
 	if (!check_types) {
 		return return_type;
 	}
@@ -6854,11 +6855,9 @@ GDScriptParser::DataType GDScriptParser::_reduce_function_call_type(const Operat
 
 		if (!par_type.has_type) {
 			_mark_line_as_unsafe(p_call->line);
-#ifdef DEBUG_ENABLED
 			if (par_type.may_yield && p_call->arguments[i]->type == Node::TYPE_OPERATOR) {
 				_add_warning(GDScriptWarning::FUNCTION_MAY_YIELD, p_call->line, _find_function_name(static_cast<OperatorNode *>(p_call->arguments[i])));
 			}
-#endif // DEBUG_ENABLED
 		} else if (!_is_type_compatible(arg_types[i - arg_diff], par_type, true)) {
 			// Supertypes are acceptable for dynamic compliance
 			if (!_is_type_compatible(par_type, arg_types[i - arg_diff])) {
@@ -6871,14 +6870,14 @@ GDScriptParser::DataType GDScriptParser::_reduce_function_call_type(const Operat
 				_mark_line_as_unsafe(p_call->line);
 			}
 		} else {
-#ifdef DEBUG_ENABLED
 			if (arg_type.kind == DataType::BUILTIN && arg_type.builtin_type == Variant::INT && par_type.kind == DataType::BUILTIN && par_type.builtin_type == Variant::REAL) {
 				_add_warning(GDScriptWarning::NARROWING_CONVERSION, p_call->line, callee_name);
 			}
-#endif // DEBUG_ENABLED
 		}
 	}
 
+#endif // DEBUG_ENABLED
+
 	return return_type;
 }