Jordy Rose 459d5f62c2 [analyzer] strncpy: Special-case a length of 0 to avoid an incorrect warning. ...

We check the address of the last element accessed, but with 0 calculating that
address results in element -1. This patch bails out early (and avoids a bunch
of other work at that).

Fixes PR12807.

llvm-svn: 156769

2012-05-14 17:58:35 +00:00

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