Remote crash in ICQ

[John Bailey]

Hi, everyone.

Here is a patch that I committed for the upcoming Pidgin 2.5.8 that fixes a
remote crash.  If an ICQ user sends a web message to a libpurple user, the
message can be misparsed as being an SMS message, thus causing an excessively
large allocation.  The attached patch corrects that and makes some other minor
tweaks.

The bug was discovered by Yuriy Kaminskiy.  This patch is a combination of four
related patches he submitted to fix this bug.

John
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