Fix compile time issue in libbirdgems code

The Graphics Gems code was writen by Andrew Glassner and published in
Academic Press, 1990. It is amazing that the code still compiles and
works in 2025. However, the last version off gcc complains about the
function definitions. I updated the function definitions.

Merge branch 'master' of github.com:johanmattssonm/birdfont

Merge branch 'master' of github.com:johanmattssonm/birdfont

Merge pull request #12 from jasperla/malloc_h

Use the right header to get malloc(3)

Use the right header to get malloc(3)

it seems only linux doesn't have malloc(3) defined in stdlib.h, even though
this is required by POSIX. On OS X malloc(3) lives in stdlib.h, and only the
special functions such as malloc_size(3) are defined in malloc/malloc.h.

Handle full buffer in bezier curve simplification

Thread specific buffer for path simplification in libbirdgems

Build with clang

Fix Clang compile error

Merge branch '2.7.10' of github.com:johanmattssonm/birdfont

Merge branch 'master' of /home/johan/birdfont-android/../birdfont

Fix birdgem bug

Build on mac

Line mode Beziér tool

Create a library of the Graphics Gems code