Fix crash (double close) introduced by PR#275

Author: 9EOR9

unittest/libmariadb/misc.c

@@ -310,7 +310,7 @@ static int test_frm_bug(MYSQL *mysql)
     fclose(test_file);
   FAIL_IF(!row, "couldn't fetch row");
 
-  if(row[17] != 0)
+  if(row[17] == 0)
     fclose(test_file);
   FAIL_UNLESS(row[17] != 0, "row[17] != 0");