util: Use LONG_MAX instead of LONG_BIT.
util: Use LONG_MAX instead of LONG_BIT.

More portable.  Based on Roland Scheidegger's idea.

Tested with roundevent_test on Linux, MinGW, and MSVC.

https://bugs.freedesktop.org/show_bug.cgi?id=91591

Reviewed-by: Roland Scheidegger <7d58aee419d6f9201d75517c885374dff5e7d848@vmware.com>
Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler