png-1.5 fixes

[wargus]

png-1.5 fixes

[timfel]

(by tk-giga)

[timfel]

(by pali)
And why is this patch needed?

[timfel]

(by tk-giga)
As I said, png-1.5 now forbids access to internal struct members.
Compilerwise, without the patch, it looks like this:
src/video/obj/../png.c: In function 'LoadGraphicPNG':
src/video/obj/../png.c:136: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:215: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:219: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:227: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:273: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:274: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:275: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:276: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:277: error: dereferencing pointer to incomplete type
src/video/obj/../png.c:278: error: dereferencing pointer to incomplete type
src/video/obj/../png.c: In function 'SaveScreenshotPNG':
src/video/obj/../png.c:334: error: dereferencing pointer to incomplete type

[timfel]

(by pali)
Is this bug same as this https://bugs.launchpad.net/stratagus/+bug/816575 ?

[timfel]

(by tk-giga)
Yes, this patch will fix the issue reported in https://bugs.launchpad.net/stratagus/+bug/816575
Sorry that I overlooked that bug report.

[timfel]

(by pali)
Your patch file was not possible to apply, because it was for old version of stratagus. It was against file png.c, but in stratagus is now png.cpp (and has other structure). So I modified file png.cpp manually.

Chnages is in this commit: http://bazaar.launchpad.net/~stratagus/stratagus/trunk/revision/7993
Check if all png erros is fixed.