This patch makes the build use its own Xcomposite.h over rather than an
older Xcomposite.h that might already be installed in the staging dir.

--- libXcomposite-0.4.1/src/Makefile.am.orig	2010-06-27 15:50:05.000000000 +0800
+++ libXcomposite-0.4.1/src/Makefile.am	2010-06-27 15:51:48.000000000 +0800
@@ -19,7 +19,7 @@
 #  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 #  PERFORMANCE OF THIS SOFTWARE.
 
-AM_CFLAGS = $(CWARNFLAGS) $(XCOMPOSITE_CFLAGS) $(X_CFLAGS)
+AM_CFLAGS = -I$(top_srcdir)/include $(CWARNFLAGS) $(XCOMPOSITE_CFLAGS) $(X_CFLAGS)
 AM_CPPFLAGS = -I$(top_srcdir)/include
 
 lib_LTLIBRARIES = libXcomposite.la