If "dissect_dcerpc_cn()" throws an exception when called by

"dissect_dcerpc_cn_bs_body()", it's because it recognized the packet as
a DCE RPC packet, but it ran out of data dissecting it as such;
increment the count of DCE RPC PDUs, so "dissect_dcerpc_cn_bs_body()"
returns TRUE, and its caller doesn't think nothing was dissected.

Fuzzed with some DCE RPC captures.

svn path=/trunk/; revision=16000

epan/dissectors/packet-dcerpc.c

@@ -4150,6 +4150,11 @@ dissect_dcerpc_cn_bs_body (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
             RETHROW;
         } CATCH(ReportedBoundsError) {
             show_reported_bounds_error(tvb, pinfo, tree);
+            /*
+             * Presumably it looked enough like a DCE RPC PDU that we
+             * dissected enough of it to throw an exception.
+             */
+            dcerpc_pdus++;
         } ENDTRY;
 
         if (!dcerpc_pdus) {