Leftover includes of "memory.h" cause build errors on iOS

[vzsg]

Hi!

In the past, there was a header file in the library called "memory.h", which FWIW has been merged into the cmark.h header.

Yet, a few source files are still trying to include it:

• buffer.c
• chunk.h
• iterator.h
• parser.h
• references.h
• render.h

In some obscure scenarios, like when trying to use cmark on iOS in the same project as another library that includes a file called memory.h, the compiler gets confused and hell breaks loose.

Is it possible to remove these offending includes?

TIA.

[jgm]

Thanks for noticing!