* frame.c (Fmodify_frame_parameters): Simplify loop counter.

This also avoids a warning with gcc -Wstrict-overflow.

src/ChangeLog

 2011-03-21  Paul Eggert  <eggert@cs.ucla.edu>
+	* frame.c (Fmodify_frame_parameters): Simplify loop counter.
+	This also avoids a warning with gcc -Wstrict-overflow.
+
 	* fileio.c (Fcopy_file): Report error if fchown or fchmod
 	fail (Bug#8306).

src/frame.c

@@ -2529,8 +2529,9 @@ use is not recommended.  Explicitly check for a frame-parameter instead.  */)
 	}
 
       /* Now process them in reverse of specified order.  */
-      for (i--; i >= 0; i--)
+      while (i != 0)
 	{
+	  i--;
 	  prop = parms[i];
 	  val = values[i];
 	  store_frame_param (f, prop, val);