Analyze->Decode as... menu item becomes unavailable

This issue was migrated from bug 3642 in our old bug tracker.

Original bug information:

Reporter: Artem Tamazov
Status: RESOLVED FIXED
Product: Wireshark
Component: GTK+ UI
OS: All
Platform: All
Version: 1.3.x (Experimental)

Attachments:

vccv_ping_dump_N51-N52_short.pcap: stream to reproduce the problem
decode-as_fix-001.patch: decode-as_fix-001.patch