Add some explicit casts from the FP_* macros to type int, so that comparisons actually work when building with GCC, this is GCC bug report: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20589.

[SVN r44434]

libs/math

@@ -1 +1 @@
-Subproject commit 74b36956cb2b96675f1d6712e799ac62ad0d7abc
+Subproject commit fb220c20dd9cc7c178cdebb8edb92f84e8f326fa