Itseez/opencv — pull request #1310 by leszekhanusz (2013-08-21 03:39:03+00:00)
Title: Allow to read PNG image of color_type PNG_COLOR_TYPE_PALETTE with alpha channel

Correct reading PNG color type palette with or without alpha imread flags -1 or 1
Better not using pnginfo.h, using png_get_tRNS instead