FIXED: Signed/unsigned conversions in regex_compile.hpp and regex_format.hpp

ADDED:    Forwarder functions to match_results.
FIXED:    More errors from Como in strict mode.


[SVN r8826]

libs/regex

@@ -1 +1 @@
-Subproject commit 1afe49fdbf660d11fe49399cdb7dfca8454d563e
+Subproject commit 31c5b449bb25170754638312678230da075b9ed9