This update fixes the following issues with enblend-enfuse:
- bnc#852185: Update to 4.1.3
+ Bug Fixes:
* [Enblend only] Fix problem of multiple, almost-identical seamlines that produce inexplicable black areas in the output panorama.
+ LCMS 2.5 is now required to build.
- Ensure only -Os is used for compilation, not -O2

- update to version 4.1.2:
+ Bug Fixes:
* lp#1214004: [Enblend and Enfuse] Fix a bug in the highlight-recovery that caused Enfuse to bail out with the uncaught exception "Minimizer1D::set_bracket: minimum not bracketed".
* [Enfuse] Clean up seemingly random, bright-colored pixels that sometimes show up when fusing images with high contrast and "large" color profiles.
* [Enblend only] Fix a race condition in the seam-line optimizer that can cause wrongly placed seams.
* [Enblend and Enfuse] Use a per-thread storage of all OpenMP Vigra-functors. This avoids data races.
* [Enblend and Enfuse] The Boost implementation of the `Mersenne Twister' random number generator caused segmentation faults when used in the OpenMP-enabled versions of Enblend and Enfuse. The new implementation is based on the GNU Scientific Library (GSL), which plays nicely with concurrent accesses.
* [Enblend only] Correct a mistake that causes overlapping images with multiple seams to be blended incorrectly.
* [Enblend only] Require the OpenGL extension `GL_ARB_texture_rectangle' for the `--gpu' option to work. This does away with a pesky warning of OpenGL drivers that do support this extension and avoids crashes with drivers that don't.
The GPU performance improvement of Enblend via `--gpu' now is only available with drivers that feature `GL_ARB_texture_rectangle' (among many other required OpenGL extensions).
The OpenGL warning about odd texture sizes is unaffected by this change.
* [Enblend and Enfuse] Fix a longstanding quirk, which allowed to load masks that were unsuitable for processing.