wb_presets: Sony SLT-A58 (thanks to Flemming Christensen)
wb_presets: Sony SLT-A58 (fixed)
blending: fix recent warning message 'unknown blend mode 0'
Merge branch 'master' of ssh://github.com/darktable-org/darktable
Slightly change dt_develop_blend_params_is_all_zero

no need to keep iterating if we already know the answer