figure out the failure codes for all the int and uint return values for win32k.sys syscalls

_From [bruen...@google.com](https://code.google.com/u/109494838902877177630/) on December 05, 2012 19:39:38_

issue #1090 is adding return value types to all the syscalls. notskrnl are all NTSTATUS, but NtUser and NtGdi have a lot of different types. many are integer types. we're going to need to individually look up their failure codes (i.e., whether 0 indicates failure, or -1, or < 0, or what).

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=1093_