[git] GCRYPT - branch, master, updated. libgcrypt-1.7.3-23-g995ce69

[by Werner Koch]

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- Log -----------------------------------------------------------------
commit 995ce697308320c6a52a307f83dc49eeb8d784b4
Author: Werner Koch <wk at gnupg.org>
Date:   Tue Dec 6 22:19:04 2016 +0100

    Fix compiler warning about possible-NULL-dreference
    
    * src/mpi.h (mpi_is_const, mpi_is_immutable): Do check arg before
    deref-ing.  The are only used at places where the arg shall not be NULL.
    --
    
    This was designed as a general purpose macro and written in a
    defensive way.  However, if it a NULL would be passed to that macro
    code run in the else branch will deref the arg anyway.
    
    Signed-off-by: Werner Koch <wk at gnupg.org>

diff --git a/src/mpi.h b/src/mpi.h
index cd539f5..b5385b5 100644
--- a/src/mpi.h
+++ b/src/mpi.h
@@ -109,8 +109,8 @@ struct gcry_mpi
 void _gcry_mpi_immutable_failed (void);
 #define mpi_immutable_failed() _gcry_mpi_immutable_failed ()
 
-#define mpi_is_const(a)       ((a) && ((a)->flags&32))
-#define mpi_is_immutable(a)   ((a) && ((a)->flags&16))
+#define mpi_is_const(a)       ((a)->flags&32)
+#define mpi_is_immutable(a)   ((a)->flags&16)
 #define mpi_is_opaque(a)      ((a) && ((a)->flags&4))
 #define mpi_is_secure(a)      ((a) && ((a)->flags&1))
 #define mpi_clear(a)          _gcry_mpi_clear ((a))

-----------------------------------------------------------------------

Summary of changes:
 src/mpi.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)


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