Add an rfbLogPError that shows something on WIN32

libvncserver/main.c

@@ -261,7 +261,16 @@ rfbLogProc rfbErr=rfbDefaultLog;
 
 void rfbLogPerror(const char *str)
 {
+#ifdef WIN32
+    wchar_t *s = NULL;
+    FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 
+                   NULL, errno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                   (LPWSTR)&s, 0, NULL);
+    rfbErr("%s: %S\n", str, s);
+    LocalFree(s);
+#else
     rfbErr("%s: %s\n", str, strerror(errno));
+#endif
 }
 
 void rfbScheduleCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy)