patch 9.0.1110: build fails on Mac OS X 10.4/10.5

Problem:    Build fails on Mac OS X 10.4/10.5 .
Solution:   Check if the dispatch/dispatch.h header exists. (Evan Miller,
            closes #11746)
diff --git a/src/version.c b/src/version.c
index 773a919..3d2b851 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1110,
+/**/
     1109,
 /**/
     1108,