tags 969128 +patch tags 969128 +fixed-upstream thanks
libmagick++-6.q16-dev includes assert.h inside namespace.
Looks like upstream finally fixed this after a duplicate was filed in the imagemagick 7 issue tracker (they fixed it in both versions 6 and 7) https://github.com/ImageMagick/ImageMagick6/commit/88543494464bf94ef3430ba33bb34c62ba5050d6#diff-3268ce380c3c96855c30ea8875946bebcb93394c3f6e4b64d18028d73d618316
