[[ Valgrind ]] MCUuidFromCString(): Properly nul-terminate C string.

Prevents potential buffer overrun by strtoul(3).
Merge pull request #1476 from peter-b/misc-valgrind

[[ Valgrind ]] MCUuidFromCString(): Properly nul-terminate C string.
[[ Bug 14031 ]] iOS pixelDensity not defined
Revert "[[ Bug 14031 ]] iOS pixelDensity not defined"

This reverts commit b60acff29cd6575c81002a7e0a93b816f5a968d4.
[[ Bug 13987 ]] Make sure data refs are destroyed properly
Merge pull request #1505 from runrevali/bugfix-13987

[[ Bug 13987 ]] Make sure data refs are destroyed properly
[[ Bug 13988 ]] Put data into var chunk should convert to data where losslessly possible
Fix memory leak in variable setting shortcut