Add a rule for another type of memory leak to find-mem-leak.cocci.

Author: mansourmoufid

scripts/find-mem-leak.cocci

@@ -7,3 +7,14 @@ statement S;
   ...
 * if (x == NULL || y == NULL)
     S
+
+@@
+expression x, y;
+statement S;
+@@
+  if (
+*   (x = polarssl_malloc(...)) == NULL
+    ||
+*   (y = polarssl_malloc(...)) == NULL
+  )
+    S