Log Message:
ImageMagick: update to 7.0.7.38.

2018-06-02 7.0.7-38 Cristy <quetzlzacatenango@image...>
Release ImageMagick version 7.0.7-38, GIT revision 14409:01e395a73:20180602.

2018-05-30 7.0.7-38 <quetzlzacatenango@image...>
Heap buffer overflow fix (reference \ 
https://github.com/ImageMagick/ImageMagick/issues/1156).
Boundary issues with -gamma option when HDRI is enabled (reference \ 
https://github.com/ImageMagick/ImageMagick/issues/1151).
Fixed numerous use of uninitialized values, integer overflow, memory exceeded, \ 
and timeouts (credit to OSS Fuzz).