Fix for platforms where the result of the expression

std::numeric_limits<wchar_t>::max() + 1 cannot be represented as an unsigned int.


[SVN r25730]

libs/spirit

@@ -1 +1 @@
-Subproject commit 8457fe08c1d424d5776c08954a1021c5e60f7969
+Subproject commit 36379ab28036e6c60e059d68c539c1b822f91500