[cache] Fix an off-by-one bug in FTC_Manager_RemoveFaceID().

Found by <ychen1392001@yahoo.com.cn>, see detail in

  http://lists.gnu.org/archive/html/freetype/2011-01/msg00023.html

* src/cache/ftccache.c (FTC_Cache_RemoveFaceID): Check the node
buckets[cache->p + cache->mask] too.

ChangeLog

@@ -1,3 +1,13 @@
+2011-02-20  suzuki toshiya  <mpsuzuki@hiroshima-u.ac.jp>
+
+	[cache] Fix an off-by-one bug in FTC_Manager_RemoveFaceID().
+	Found by <ychen1392001@yahoo.com.cn>, see detail in
+
+	  http://lists.gnu.org/archive/html/freetype/2011-01/msg00023.html
+
+	* src/cache/ftccache.c (FTC_Cache_RemoveFaceID): Check the node
+	buckets[cache->p + cache->mask] too.
+
 2011-02-19  Kevin Kofler  <kevin.kofler@chello.at>
 
 	Fall back to autohinting if a TTF/OTF doesn't contain any bytecode.

src/cache/ftccache.c

@@ -574,7 +574,7 @@
     FTC_Node     frees   = NULL;
 
 
-    count = cache->p + cache->mask;
+    count = cache->p + cache->mask + 1;
     for ( i = 0; i < count; i++ )
     {
       FTC_Node*  bucket = cache->buckets + i;