Fix minor problems found by static checking.

* frame.c (delete_frame):
* xdisp.c (next_element_from_display_vector):
Avoid uninitialized local.
* image.c (imagemagick_compute_animated_image): Port to C89.
Prefer usual GNU indentation style for loops.
Be more careful about bizarrely large sizes, by using ptrdiff_t
instead of int.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/frame.c b/src/frame.c
index 957f08b06c5..5ee001f4d98 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -1197,7 +1197,8 @@ delete_frame (Lisp_Object frame, Lisp_Object force)
   /* Don't let the frame remain selected.  */
   if (f == sf)
     {
-      Lisp_Object tail, frame1;
+      Lisp_Object tail;
+      Lisp_Object frame1 = Qnil;
 
       /* Look for another visible frame on the same terminal.
          Do not call next_frame here because it may loop forever.