- Avoid inline ifdef checks for DEBUG_STRSIZE
- Add BLI_string_debug_size_after_nil to ensure strings to manipulate
have the expected buffer size after the nil terminator.
- Add checks to more string manipulation functions.
Further changes are required for this to be enabled during regular
development as the RNA currently allocates the strings length but
passes in the buffer size as a limit which conflicts with DEBUG_STRSIZE.
069db83152