internal.h (backtrace_atomic_load_pointer): Fix to return void *.

	* internal.h (backtrace_atomic_load_pointer) [no atomic or sync]:
	Fix to return void *.

From-SVN: r216603

libbacktrace/ChangeLog

+2014-10-23  Ian Lance Taylor  <iant@google.com>
+
+	* internal.h (backtrace_atomic_load_pointer) [no atomic or sync]:
+	Fix to return void *.
+
 2014-05-08  Ian Lance Taylor  <iant@google.com>
 
 	* mmap.c (backtrace_free): If freeing a large aligned block of

libbacktrace/internal.h

@@ -99,7 +99,7 @@ extern void backtrace_atomic_store_int (int *, int);
 /* We have neither the sync nor the atomic functions.  These will
    never be called.  */
 
-#define backtrace_atomic_load_pointer(p) (abort(), 0)
+#define backtrace_atomic_load_pointer(p) (abort(), (void *) NULL)
 #define backtrace_atomic_load_int(p) (abort(), 0)
 #define backtrace_atomic_store_pointer(p, v) abort()
 #define backtrace_atomic_store_size_t(p, v) abort()