Cleanup xmalloc.

* admin/coccinelle/xzalloc.cocci: Semantic patch to convert
calls to xmalloc with following memset to xzalloc.
* src/lisp.h (xzalloc): New prototype.  Omit needless casts.
* src/alloc.c (xzalloc): New function.  Omit needless casts.
* src/charset.c: Omit needless casts.  Convert all calls to
malloc with following memset to xzalloc.
* src/dispnew.c: Likewise.
* src/fringe.c: Likewise.
* src/image.c: Likewise.
* src/sound.c: Likewise.
* src/term.c: Likewise.
* src/w32fns.c: Likewise.
* src/w32font.c: Likewise.
* src/w32term.c: Likewise.
* src/xfaces.c: Likewise.
* src/xfns.c: Likewise.
* src/xterm.c: Likewise.
* src/atimer.c: Omit needless casts.
* src/buffer.c: Likewise.
* src/callproc.c: Likewise.
* src/ccl.c: Likewise.
* src/coding.c: Likewise.
* src/composite.c: Likewise.
* src/doc.c: Likewise.
* src/doprnt.c: Likewise.
* src/editfns.c: Likewise.
* src/emacs.c: Likewise.
* src/eval.c: Likewise.
* src/filelock.c: Likewise.
* src/fns.c: Likewise.
* src/gtkutil.c: Likewise.
* src/keyboard.c: Likewise.
* src/lisp.h: Likewise.
* src/lread.c: Likewise.
* src/minibuf.c: Likewise.
* src/msdos.c: Likewise.
* src/print.c: Likewise.
* src/process.c: Likewise.
* src/region-cache.c: Likewise.
* src/search.c: Likewise.
* src/sysdep.c: Likewise.
* src/termcap.c: Likewise.
* src/terminal.c: Likewise.
* src/tparam.c: Likewise.
* src/w16select.c: Likewise.
* src/w32.c: Likewise.
* src/w32reg.c: Likewise.
* src/w32select.c: Likewise.
* src/w32uniscribe.c: Likewise.
* src/widget.c: Likewise.
* src/xdisp.c: Likewise.
* src/xmenu.c: Likewise.
* src/xrdb.c: Likewise.
* src/xselect.c: Likewise.

1 files changed, 3 insertions, 5 deletions

diff --git a/src/region-cache.c b/src/region-cache.c
index 2642e824680..a3a2a072c8c 100644
--- a/src/region-cache.c
+++ b/src/region-cache.c
@@ -132,15 +132,13 @@ static void revalidate_region_cache (struct buffer *buf, struct region_cache *c)
 struct region_cache *
 new_region_cache (void)
 {
-  struct region_cache *c
-    = (struct region_cache *) xmalloc (sizeof (struct region_cache));
+  struct region_cache *c = xmalloc (sizeof (struct region_cache));
 
   c->gap_start = 0;
   c->gap_len = NEW_CACHE_GAP;
   c->cache_len = 0;
-  c->boundaries =
-    (struct boundary *) xmalloc ((c->gap_len + c->cache_len)
-                                 * sizeof (*c->boundaries));
+  c->boundaries = xmalloc ((c->gap_len + c->cache_len)
+                           * sizeof (*c->boundaries));
 
   c->beg_unchanged = 0;
   c->end_unchanged = 0;