add stdio.h include for msvc, remove truncating cast warning, change to dynamic runtime on msvc.  You can not pass FILE * between mods with differrent runtimes on msvc.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1125 d0543943-73ff-0310-b7d9-9358b9ac24b2