AnnotateImage() should not treat empty text primitive as an error
Origin: upstream, https://sourceforge.net/p/graphicsmagick/code/ci/
6a495ea9d47f42d8e900ac10e7be45892d052feb/
Bug-Debian: https://bugs.debian.org/759956
Last-Update: 2014-09-27
Gbp-Pq: Name AnnotateImage_fix.patch