preproc: Don't dereference nil @istk
commit771d04e263f16ed496da3573e8b0481d7c25314d
authorCyrill Gorcunov <gorcunov@gmail.com>
Tue, 10 May 2016 20:27:03 +0000 (10 23:27 +0300)
committerCyrill Gorcunov <gorcunov@gmail.com>
Tue, 10 May 2016 20:27:03 +0000 (10 23:27 +0300)
treedf8f3553b6eab4f3612c491976f4cb49d909cc50
parentacb48602fc506e8073c477309db707978724b7a5
preproc: Don't dereference nil @istk

If not input was specified istk = NULL, so don't dereference it.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
preproc.c