pcp

Minor 64/32 bit cleanup in the Linux NUMA stats.

Resolves warnings of this nature from gcc:
numa_meminfo.c:69: warning: integer constant is too large for ‘long’ type
numa_meminfo.c:70: warning: integer constant is too large for ‘long’ type
numa_meminfo.c:71: warning: integer constant is too large for ‘long’ type
numa_meminfo.c:72: warning: integer constant is too large for ‘long’ type
numa_meminfo.c:73: warning: integer constant is too large for ‘long’ type
numa_meminfo.c:74: warning: integer constant is too large for ‘long’ type

Also make use of the field: C99(?) struct init notation
for more clarity on which of the fields are being set statically.