COMP: Changed type of regmlen to avoid warnings when other lengths are converted to it.

RegularExpression.hxx.in

@@ -276,7 +276,7 @@ private:
   char  regstart;                       // Internal use only
   char  reganch;                        // Internal use only
   const char* regmust;                  // Internal use only
-  int   regmlen;                        // Internal use only
+  unsigned long regmlen;                // Internal use only
   char* program;   
   int   progsize;
   const char* searchstring;