[Arabic] Fix post-context handling
Ouch!
diff --git a/src/hb-ot-shape-complex-arabic.cc b/src/hb-ot-shape-complex-arabic.cc
index 59c9716..591c743 100644
--- a/src/hb-ot-shape-complex-arabic.cc
+++ b/src/hb-ot-shape-complex-arabic.cc
@@ -286,7 +286,7 @@
if (!(buffer->flags & HB_BUFFER_FLAG_EOT))
for (unsigned int i = 0; i < buffer->context_len[1]; i++)
{
- unsigned int this_type = get_joining_type (buffer->context[1][i], buffer->unicode->general_category (buffer->context[0][i]));
+ unsigned int this_type = get_joining_type (buffer->context[1][i], buffer->unicode->general_category (buffer->context[1][i]));
if (unlikely (this_type == JOINING_TYPE_T))
continue;
