Bug #52: Deletion of unnecessary checks before calls of the function "free"

The function "free" is documented in the way that no action shall occur for
a passed null pointer. It is therefore not needed that a function caller
repeats a corresponding check.
http://stackoverflow.com/questions/18775608/free-a-null-pointer-anyway-or-check-first

This issue was fixed by using the software Coccinelle 1.0.0-rc22.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Bug #52: Deletion of unnecessary checks before calls of the function "http_get_free"

The function "http_get_free" returns immediately if a null pointer was passed.
It is therefore not needed that a function caller repeats a corresponding check.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Merge pull request #90 from elfring/Remove_unnecessary_checks1

Deletion of unnecessary checks before two function calls