Merge pilot.mysql.com:/data/msvensson/mysql/my50-bt-36463

into  pilot.mysql.com:/data/msvensson/mysql/mysql-5.0-build

dbug/dbug.c

@@ -493,7 +493,7 @@ static void DbugParse(CODE_STATE *cs, const char *control)
   }
 
   end= DbugStrTok(control);
-  while (1)
+  while (control < end)
   {
     int c, sign= (*control == '+') ? 1 : (*control == '-') ? -1 : 0;
     if (sign) control++;