Fix quitting bug when buffers are frozen

Problem noted by Eli Zaretskii in:
http://lists.gnu.org/archive/html/emacs-devel/2017-01/msg00721.html
This patch also fixes some other issues in that report.
* src/lisp.h (incr_rarely_quit): Remove.
All callers changed to use rarely_quit directly.
* src/search.c (freeze_buffer_relocation)
(thaw_buffer_relocation): New functions.
(looking_at_1, fast_looking_at, search_buffer):
Use them to fix bug when quitting when buffers are frozen.
* src/sysdep.c (emacs_intr_read): Rename from emacs_nointr_read.
All uses changed.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/indent.c b/src/indent.c
index aff14abfd20..f630ebb847c 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1215,7 +1215,7 @@ compute_motion (ptrdiff_t from, ptrdiff_t frombyte, EMACS_INT fromvpos,
 
   while (true)
     {
-      incr_rarely_quit (&quit_count);
+      rarely_quit (++quit_count);
 
       while (pos == next_boundary)
         {
@@ -1282,7 +1282,7 @@ compute_motion (ptrdiff_t from, ptrdiff_t frombyte, EMACS_INT fromvpos,
               pos_byte = CHAR_TO_BYTE (pos);
             }
 
-          incr_rarely_quit (&quit_count);
+          rarely_quit (++quit_count);
         }
 
       /* Handle right margin.  */
@@ -1605,7 +1605,7 @@ compute_motion (ptrdiff_t from, ptrdiff_t frombyte, EMACS_INT fromvpos,
                               pos = find_before_next_newline (pos, to, 1, &pos_byte);
                               if (pos < to)
                                 INC_BOTH (pos, pos_byte);
-                              incr_rarely_quit (&quit_count);
+                              rarely_quit (++quit_count);
                             }
                           while (pos < to
                                  && indented_beyond_p (pos, pos_byte,