COMP: remove warning and check for assignment to itself in operator=

RegularExpression.cxx

@@ -77,6 +77,10 @@ RegularExpression::RegularExpression (const RegularExpression& rxp) {
 // operator= -- Copies the given regular expression.
 RegularExpression& RegularExpression::operator= (const RegularExpression& rxp)
 {
+  if(this == &rxp)
+    {
+    return *this;
+    }
   if ( !rxp.program )
     {
     this->program = 0;

kwsysDateStamp.cmake

@@ -7,4 +7,4 @@ SET(KWSYS_DATE_STAMP_YEAR  2008)
 SET(KWSYS_DATE_STAMP_MONTH 07)
 
 # KWSys version date day component.  Format is DD.
-SET(KWSYS_DATE_STAMP_DAY   09)
+SET(KWSYS_DATE_STAMP_DAY   10)