(assert_perror): Correct test for errnum.

diff --git a/assert/assert.h b/assert/assert.h
index 3f0b55f866fe203ae0072319c2d04b388a05da20..ec54f64c05e32ee93f5be807b99520fa267d5306 100644 (file)
--- a/assert/assert.h
+++ b/assert/assert.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 92, 94, 95, 96, 97 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 92, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -80,9 +80,9 @@ __END_DECLS
 
 # ifdef        __USE_GNU
 #  define assert_perror(errnum)                                                      \
-  ((void) ((errnum) ? 0 : (__assert_perror_fail ((errnum),                   \
-                                                __FILE__, __LINE__,          \
-                                                __ASSERT_FUNCTION), 0)))
+  ((void) (!(errnum) ? 0 : (__assert_perror_fail ((errnum),                  \
+                                                 __FILE__, __LINE__,         \
+                                                 __ASSERT_FUNCTION), 0)))
 # endif
 
 /* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'