[cff] Fix uninitialized memory.

Problem reported as

  https://bugzilla.mozilla.org/show_bug.cgi?id=1270288

* src/cff/cf2interp.c (cf2_interpT2CharString): Initialize `storage'
array to handle a `get' opcode without a previous `put'.

ChangeLog

@@ -1,3 +1,14 @@
+2016-09-06  Jonathan Kew  <jfkthame@gmail.com>
+
+	[cff] Fix uninitialized memory.
+
+	Problem reported as
+
+	  https://bugzilla.mozilla.org/show_bug.cgi?id=1270288
+
+	* src/cff/cf2interp.c (cf2_interpT2CharString): Initialize `storage'
+	array to handle a `get' opcode without a previous `put'.
+
 2016-09-05  Alexei Podtelezhnikov  <apodtele@gmail.com>
 
 	* src/smooth/ftgrays.c (gray_move_to, gray_start_cell): Revert.

src/cff/cf2intrp.c

@@ -469,6 +469,8 @@
     CF2_GlyphPathRec  glyphPath;
 
 
+    FT_ZERO( &storage );
+
     /* initialize the remaining objects */
     cf2_arrstack_init( &subrStack,
                        memory,