nat plugin - fix test logic
warning found by clang:
warning: logical not is only applied to the left hand side of
this bitwise operator [-Wlogical-not-parentheses]
@@ -409,7 +409,7 @@ typedef struct {
@param s SNAT session
@return 1 if SNAT session is created from static mapping otherwise 0
*/
-#define snat_is_session_static(s) s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING
+#define snat_is_session_static(s) (s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING)
/** \brief Check if SNAT session for unknown protocol.
@param s SNAT session
