Update core.cpp

Author: JamieD1

byond-extools/src/core/core.cpp

@@ -111,7 +111,7 @@ void Core::Alert(int what)
 }
 
 unsigned int Core::GetStringId(std::string str, bool increment_refcount) {
-	if (ByondVersion == 514) {
+	if (ByondVersion >= 514) {
 		return GetStringTableIndexUTF8(str.c_str(), 0xFFFFFFFF, 0, 1);
 	}
 	return 0;