ebb06fbeaf
Due to the same problem with sizeof(long) mismatch as in the previous commit, we can't use struct timeval, with its long fields, in 64 bit Cygwin builds, and need to use __ms_timeval instead. Add wxTimeVal_t type to hide this difference and update all code compiled under MSW (there is no need to uglify Unix-only code using timeval, as in wxSelectDispatcher, for example) to use it instead of timeval.