From: Richard M. Stallman <rms@gnu.org>
Date: Wed, 7 Apr 1993 22:09:23 +0000 (+0000)
Subject: (interrupt_input_blocked): Make this signed int.
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(interrupt_input_blocked): Make this signed int.
---

diff --git a/src/blockinput.h b/src/blockinput.h
index 0571a648107..f8b09419b7d 100644
--- a/src/blockinput.h
+++ b/src/blockinput.h
@@ -43,7 +43,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
    interrupt_input_pending to a non-zero value.  If that flag is set
    when input becomes unblocked, UNBLOCK_INPUT will send a new SIGIO.  */
 
-extern unsigned int interrupt_input_blocked;
+extern int interrupt_input_blocked;
 
 /* Nonzero means an input interrupt has arrived
    during the current critical section.  */