* There is no need for moving data to memory to remove fraction bits.

* Use failsafe malloc wrappers when not.

* Also use failsafe wrappers for malloc.

* These are mostly due to conditional compilation.

* C automatically expands such expressions to int.

* The macros defined in config.h might change size of off_t, symbols available
  from system headers etc. This effect will vary from system to system even.

* In practice indexing into RMA buffers may require 64bit addressing,
  even though individual data sets are still limited to INT_MAX
  entries.