Avoid compiler warnings in comparing time_t.

 src/dispnew.c (sit_for, Fsleep_for):
 src/keyboard.c (kbd_buffer_get_event):
 src/process.c (Faccept_process_output): Avoid compiler warnings when
 comparing a 32-bit time_t with a 64-bit INTMAX_MAX.

src/ChangeLog

+2012-06-23  Eli Zaretskii  <eliz@gnu.org>
+
+	* dispnew.c (sit_for, Fsleep_for):
+	* keyboard.c (kbd_buffer_get_event):
+	* process.c (Faccept_process_output): Avoid compiler warnings when
+	comparing a 32-bit time_t with a 64-bit INTMAX_MAX.
+
 2012-06-23  Juanma Barranquero  <lekktu@gmail.com>
 
 	* makefile.w32-in: Update dependencies.

src/dispnew.c

@@ -5957,7 +5957,9 @@ additional wait period, in milliseconds; this is for backwards compatibility.
   if (0 < duration)
     {
       EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration);
-      wait_reading_process_output (min (EMACS_SECS (t), INTMAX_MAX),
+      intmax_t secs = EMACS_SECS (t);
+
+      wait_reading_process_output (min (secs, INTMAX_MAX),
 				   EMACS_NSECS (t), 0, 0, Qnil, NULL, 0);
     }
 
@@ -6005,7 +6007,8 @@ sit_for (Lisp_Object timeout, int reading, int do_display)
       else
 	{
 	  EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds);
-	  sec = min (EMACS_SECS (t), INTMAX_MAX);
+	  sec = EMACS_SECS (t);
+	  sec = min (sec, INTMAX_MAX);
 	  nsec = EMACS_NSECS (t);
 	}
     }

src/keyboard.c

@@ -3857,9 +3857,11 @@ kbd_buffer_get_event (KBOARD **kbp,
 	    return Qnil;	/* finished waiting */
 	  else
 	    {
+	      intmax_t secs;
+
 	      EMACS_SUB_TIME (duration, *end_time, duration);
-	      wait_reading_process_output (min (EMACS_SECS (duration),
-						INTMAX_MAX),
+	      secs = EMACS_SECS (duration);
+	      wait_reading_process_output (min (secs, INTMAX_MAX),
 					   EMACS_NSECS (duration),
 					   -1, 1, Qnil, NULL, 0);
 	    }

src/process.c

@@ -3996,7 +3996,9 @@ Return non-nil if we received any output before the timeout expired.  */)
 	  if (0 < XFLOAT_DATA (seconds))
 	    {
 	      EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds));
-	      secs = min (EMACS_SECS (t), INTMAX_MAX);
+
+	      secs = EMACS_SECS (t);
+	      secs = min (secs, INTMAX_MAX);
 	      nsecs = EMACS_NSECS (t);
 	    }
 	}