* bytecode.c (MAYBE_GC): Rewrite so as not to use empty "else".

src/ChangeLog

 2011-03-17  Paul Eggert  <eggert@cs.ucla.edu>
 
+	* bytecode.c (MAYBE_GC): Rewrite so as not to use empty "else".
+
 	* unexelf.c (unexec): Name an expression,
 	to avoid gcc -Wbad-function-cast warning.
 	Use a different way to cause a compilation error if anyone uses

src/bytecode.c

@@ -363,6 +363,7 @@ unmark_byte_stack (void)
    We do this at every branch, to avoid loops that never GC.  */
 
 #define MAYBE_GC()					\
+ do {							\
   if (consing_since_gc > gc_cons_threshold		\
       && consing_since_gc > gc_relative_threshold)	\
     {							\
@@ -370,7 +371,7 @@ unmark_byte_stack (void)
       Fgarbage_collect ();				\
       AFTER_POTENTIAL_GC ();				\
     }							\
-  else
+ } while (0)
 
 /* Check for jumping out of range.  */