LGTM.com - false positive

**Description of the false positive**

Header file contains preprocessor macros that change function names.

**URL to the alert on the project page on LGTM.com**

https://lgtm.com/projects/g/zlib-ng/zlib-ng/snapshot/d88ad4b192226f03d4c6009a7c1ec9da95399c55/files/insert_string.h?sort=name&dir=ASC&mode=heatmap
