Consider using patch from https://bugs.freedesktop.org/show_bug.cgi?id=42821
win32: Reset clip in _cairo_win32_surface_release_dest_image

	* src/cairo.c: define ffs the corresponding gcc builtin.
	* configure: Work around ^M handling on cygwin with igncr

--- configure.old	2009-02-23 14:58:37.786900000 +0100
+++ configure	2009-02-23 15:04:28.053300000 +0100
@@ -33980,6 +33980,7 @@ if test "$ac_cs_awk_cr" = "a${ac_cr}b"; 
 else
   ac_cs_awk_cr=$ac_cr
 fi
+ac_cs_awk_cr=$ac_cr
 
 echo 'BEGIN {' >"$tmp/subs1.awk" &&
 _ACEOF
--- src/cairo.c.orig	2011-11-17 12:33:14.609375000 +0100
+++ src/cairo.c	2011-11-17 12:34:15.937500000 +0100
@@ -36,6 +36,10 @@
  *	Carl D. Worth <cworth@cworth.org>
  */
 
+#ifdef __MINGW32__
+#define ffs __builtin_ffs
+#endif
+
 #include "cairoint.h"
 #include "cairo-private.h"