File CVE-2011-3922.diff of Package libqt4

--- src/3rdparty/harfbuzz/src/harfbuzz-myanmar.c
+++ src/3rdparty/harfbuzz/src/harfbuzz-myanmar.c
@@ -359,7 +359,8 @@
         if (kinzi >= 0 && i > base && (cc & Mymr_CF_AFTER_KINZI)) {
             reordered[len] = Mymr_C_NGA;
             reordered[len+1] = Mymr_C_VIRAMA;
-            properties[len-1] = AboveForm;
+            if (len > 0)
+                properties[len-1] = AboveForm;
             properties[len] = AboveForm;
             len += 2;
             kinzi = -1;