Bug#732405: upstream's #732405+#650575 fixes

Control: tags 732405 patch Control: tags 650575 patch Confirmed that 1.28 with these fixes builds in sid and in experimental + alioth's libpng1.6.7, though I haven't tried to use either result. An essentially identical libtiff fix (but not the libpng fix) is already in Ubuntu:

Bug#732405: upstream's #732405+#650575(?) fixes

The upstream source (http://cpansearch.perl.org/src/KARASIK/Prima-1.37/img/codec_tiff.c) gained a new #ifndef at lines 175-177 that would appear to be the fix, but I haven't tested this. There's also something similar at http://cpansearch.perl.org/src/KARASIK/Prima-1.37/img/codec_png.c lines