Fixed VC7.1-STLport config setup so it works with /Zc:wchar_t

Re-ordered code in static_mutex.hpp to satisfy SGI IRIX.
Added some additional #includes to satisfy SGI Irix.
Fixed strange bug where some non-greedy repeats could repeat more times than permitted.
Fixed return value from basic_regex<>::empty().
Fixed return value from basic_regex<>::expression() and basic_regex<>::size() when the expression is invalid.


[SVN r30604]

libs/regex

@@ -1 +1 @@
-Subproject commit bf96863756dfe92ee95b42c8a4ec954a90497be3
+Subproject commit c39176085b14669ed851ef207556fca0ea235be1