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, 6 insertions, 17 deletions

diff --git a/src/dispnew.c b/src/dispnew.c
index 767f1c8112b..17bd2e828fa 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -344,11 +344,7 @@ __executable_start (void)
 static struct glyph_matrix *
 new_glyph_matrix (struct glyph_pool *pool)
 {
-  struct glyph_matrix *result;
-
-  /* Allocate and clear.  */
-  result = (struct glyph_matrix *) xmalloc (sizeof *result);
-  memset (result, 0, sizeof *result);
+  struct glyph_matrix *result = xzalloc (sizeof *result);
 
   /* Increment number of allocated matrices.  This count is used
      to detect memory leaks.  */
@@ -1367,11 +1363,7 @@ row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p)
 static struct glyph_pool *
 new_glyph_pool (void)
 {
-  struct glyph_pool *result;
-
-  /* Allocate a new glyph_pool and clear it.  */
-  result = (struct glyph_pool *) xmalloc (sizeof *result);
-  memset (result, 0, sizeof *result);
+  struct glyph_pool *result = xzalloc (sizeof *result);
 
   /* For memory leak and double deletion checking.  */
   ++glyph_pool_count;
@@ -2033,19 +2025,16 @@ save_current_matrix (struct frame *f)
   int i;
   struct glyph_matrix *saved;
 
-  saved = (struct glyph_matrix *) xmalloc (sizeof *saved);
-  memset (saved, 0, sizeof *saved);
+  saved = xzalloc (sizeof *saved);
   saved->nrows = f->current_matrix->nrows;
-  saved->rows = (struct glyph_row *) xmalloc (saved->nrows
-					      * sizeof *saved->rows);
-  memset (saved->rows, 0, saved->nrows * sizeof *saved->rows);
+  saved->rows = xzalloc (saved->nrows * sizeof *saved->rows);
 
   for (i = 0; i < saved->nrows; ++i)
     {
       struct glyph_row *from = f->current_matrix->rows + i;
       struct glyph_row *to = saved->rows + i;
       ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph);
-      to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes);
+      to->glyphs[TEXT_AREA] = xmalloc (nbytes);
       memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes);
       to->used[TEXT_AREA] = from->used[TEXT_AREA];
     }
@@ -2263,7 +2252,7 @@ adjust_frame_message_buffer (struct frame *f)
       FRAME_MESSAGE_BUF (f) = new_buffer;
     }
   else
-    FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size);
+    FRAME_MESSAGE_BUF (f) = xmalloc (size);
 }