Fix parsing, update tests

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@17476 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Author: sjoelund

Parser/BaseModelica_Lexer.g

@@ -319,8 +319,9 @@ STRING : '"' STRING_GUTS '"'
            if (!*res) {
              const char *strs[2];
              signed char buf[76];
-             int len = strlen((const char*)buf), i;
+             int len, i;
              res = SystemImpl__iconv__ascii((const char*)text->chars);
+             len = strlen((const char*)res);
              /* Avoid printing huge strings */
              if (len > 75) {
                len = 72;