FindImageMagick: Use find_program instead of find_path
Since cmake 3.6 find_path doesn't use the system search paths anymore. As a result FindImageMagick wasn't able to get the executable dir.
Closes #16179 (closed)
Since cmake 3.6 find_path doesn't use the system search paths anymore. As a result FindImageMagick wasn't able to get the executable dir.
Closes #16179 (closed)