ofz#4372 Undefined-shift

upstreamed as https://bugs.freedesktop.org/show_bug.cgi?id=103845

Change-Id: I48430b2ab62991345863bceeaf3a6918f9dd1fda
Reviewed-on: https://gerrit.libreoffice.org/45078Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

external/cairo/UnpackedTarball_pixman.mk

@@ -13,6 +13,7 @@ $(eval $(call gb_UnpackedTarball_set_tarball,pixman,$(PIXMAN_TARBALL),,cairo))
 
 $(eval $(call gb_UnpackedTarball_add_patches,pixman,\
 	external/cairo/pixman/pixman-0.24.4.patch \
+	external/cairo/pixman/pixman-ofz4372.patch \
 ))
 
 ifeq ($(OS),WNT)

external/cairo/pixman/pixman-ofz4372.patch

+--- misc/pixman/pixman/pixman-solid-fill.c
++++ misc/build/pixman/pixman/pixman-solid-fill.c
+@@ -30,10 +30,10 @@ static uint32_t
+ color_to_uint32 (const pixman_color_t *color)
+ {
+     return
+-        (color->alpha >> 8 << 24) |
+-        (color->red >> 8 << 16) |
++        ((uint32_t)color->alpha >> 8 << 24) |
++        ((uint32_t)color->red >> 8 << 16) |
+         (color->green & 0xff00) |
+-        (color->blue >> 8);
++        ((uint32_t)color->blue >> 8);
+ }
+ 
+ static argb_t