core: ctx calls naked calloc()

liblglusterfs provides wrapper functions MALLOC/__gf_default_malloc,
CALLOC/__gf_default_calloc, and REALLOC/__gf_default_realloc for those
few places outside of mempool.c that need to call malloc/calloc/realloc
directly.

Notable exceptions are "contrib" code, e.g. rbtree and timer-wheel,
and perhaps parsers generated by yacc+lex. But even parsers can be
fixed to at least call the wrappers mentioned above, if not our own
allocators.

Change-Id: Ib8069815eba9b6c04c3adaf59727ec8d8795c4d1
updates: bz#1193929
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>

libglusterfs/src/ctx.c

@@ -21,7 +21,7 @@ glusterfs_ctx_new()
 
     /* no GF_CALLOC here, gf_acct_mem_set_enable is not
        yet decided at this point */
-    ctx = calloc(1, sizeof(*ctx));
+    ctx = CALLOC(1, sizeof(*ctx));
     if (!ctx) {
         goto out;
     }