Cygwin deprecated function warnings in fs_util

[mmueller]

Building on Cygwin produces warnings about deprecated functions:

fs_util.c: In function ‘fs_util_is_valid’:
fs_util.c:59:5: warning: ‘cygwin_conv_to_full_win32_path’ is deprecated (declared at /usr/include/sys/cygwin.h:36)
fs_util.c: In function ‘fs_util_create_dir’:
fs_util.c:97:5: warning: ‘cygwin_conv_to_full_win32_path’ is deprecated (declared at /usr/include/sys/cygwin.h:36)
fs_util.c: In function ‘fs_util_get_path’:
fs_util.c:152:5: warning: ‘cygwin_conv_to_full_win32_path’ is deprecated (declared at /usr/include/sys/cygwin.h:36)

This should probably be addressed before the functions become obsolete.

[mikesart]

Closing really old bugs. If this still is a problem, please open a new bug. Thanks mortdeus.