Expand cases generating warnings to cover more compilers

[SVN r29342]

tools/regression/test/run-note-warn.cpp

@@ -12,6 +12,9 @@ int main()
 
   // provoke a compiler warning to make sure <note> takes priority over
   // a warning, but neither is lost from status reporting links HTML.
-  char x = 0xffffffff;
-  return x ? 0 : 0; // use x to eliminate other warnings
+  short s;
+  unsigned long ul;
+  s = s & ul; // warning from many compilers
+  if ( s == ul ) {} // warning from GCC
+  return 0;
 }

tools/regression/test/run-pass-warn.cpp

@@ -2,9 +2,13 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-int main()
+// provoke one or more compiler warnings
+
+int main(int argc, char * argv[] )
 {
-  // provoke a compiler warning
-  char x = 0xffffffff;
-  return x ? 0 : 0; // use x to eliminate other warnings
+  short s;
+  unsigned long ul;
+  s = s & ul; // warning from many compilers
+  if ( s == ul ) {} // warning from GCC
+  return 0;
 }