
Fixed a bug in the Windows version of mkdir_win.c.  If the directory already
exists, mkdir_ew() now returns 0, ie successful return.  WMK 12/9/99

Former behavior: When a heartbeat file couldn't be opened for writing in
the temporary directory, the program tried again without sleeping (bad).
New behavior: The program exits when it can't create a heartbeat file in
the temporary directory.  WMK 1/4/00

