COMP:Fix warning on VS 64bit. Don't why gcc 4.3.2 didn't catch this one on a...

COMP:Fix warning on VS 64bit. Don't why gcc 4.3.2 didn't catch this one on a 64bit machine with -Wconversion on.

RegularExpression.cxx

@@ -348,7 +348,7 @@ static int strcspn ();
 bool RegularExpression::compile (const char* exp) {
     register const char* scan;
     register const char* longest;
-    register unsigned long len;
+    register size_t len;
              int         flags;
 
     if (exp == 0) {

kwsysDateStamp.cmake

@@ -7,4 +7,4 @@ SET(KWSYS_DATE_STAMP_YEAR  2009)
 SET(KWSYS_DATE_STAMP_MONTH 03)
 
 # KWSys version date day component.  Format is DD.
-SET(KWSYS_DATE_STAMP_DAY   17)
+SET(KWSYS_DATE_STAMP_DAY   18)