[PATCH 2/2] windowscodecs: Include png.h only if SONAME_LIBPNG is defined.

[Piotr Caban]

Signed-off-by: Piotr Caban 
---
dlls/windowscodecs/pngformat.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)