[libpng16] Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default
options declares 'index' as a global, causing a warning if it is used as a
local variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit)
to an (int) (signed 32-bit). MSVC, however, warns about using the
unary '-' operator on an unsigned value (even though it is well defined
by ANSI-C to be ~x+1). The padding calculation was changed to use a
different method. Removed the tests on png_ptr->pass.
3 files changed
