The C version of the GenericLog was being used in both C and C++ branches of the code.
Parent panic alerts by the main_frame so that those windows get the icon too.
Fix a couple of compiler warnings.
Added some checks for libraries in the cmake build.
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6385 8ced0084-cf51-0410-be5f-012b33b47a6e
