* floatfns.c (Fexpt): Omit unnecessary cast to unsigned.

src/ChangeLog

 2011-06-13  Paul Eggert  <eggert@cs.ucla.edu>
 
+	* floatfns.c (Fexpt):
 	* fileio.c (make_temp_name): Omit unnecessary cast to unsigned.
 
 	* editfns.c (Ftranslate_region_internal): Use int, not EMACS_INT

src/floatfns.c

@@ -507,7 +507,7 @@ DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0,
 	      if (y & 1)
 		acc *= x;
 	      x *= x;
-	      y = (unsigned)y >> 1;
+	      y >>= 1;
 	    }
 	}
       XSETINT (val, acc);