Fix error spam when naming a func at the end of the script

(cherry picked from commit 07dd627728b71dd3ea30bab9761a847a7e0c911e)

modules/gdscript/gdscript_parser.cpp

@@ -1521,7 +1521,7 @@ GDScriptParser::SuiteNode *GDScriptParser::parse_suite(const String &p_context,
 	int error_count = 0;
 
 	do {
-		if (!multiline && previous.type == GDScriptTokenizer::Token::SEMICOLON && check(GDScriptTokenizer::Token::NEWLINE)) {
+		if (is_at_end() || (!multiline && previous.type == GDScriptTokenizer::Token::SEMICOLON && check(GDScriptTokenizer::Token::NEWLINE))) {
 			break;
 		}
 		Node *statement = parse_statement();