[[ Cleanup ]] Add some disambiguating parentheses in common headers.
[[ Cleanup ]] Explicitly cast char->int when used as subscript.
[[ Cleanup ]] libgraphics: pthread_key_t is not a pointer type.
[[ Cleanup ]] libgraphics: More -Wconversion-null fixes.
Merge branch 'develop' into peter-b/misc-cleanup.
[[ Cleanup ]] Add some more disambiguating parentheses for && within ||.
[[ Cleanup ]] Remove unnecessarily verbose MCLog calls.
[[feature-stackdir]] Correct detection of ".e" in real number format.
[[feature-stackdir]] Don't use an MCTextFilter for string formatting.

Refactor as a loop similar to MCStackdirFormatFilename().
[[ Valgrind ]] Initialize random number variable.

Technically this isn't necessary (because failing to initialize the
value will merely add additional entropy) but it makes Valgrind shut up.
[[feature-stackdir]] Add memory allocation check.
Merge pull request #1386 from peter-b/misc-cleanup

[[ Cleanup ]] Silence some common Linux build noise.
Merge branch 'origin/develop' into feature-stackdir.