--- OLD/zlib/inftrees.c	Thu Jan  1 00:00:00 1970
+++ NEW/zlib/inftrees.c	Thu Jan  1 00:00:00 1970
@@ -445,6 +445,8 @@
     ZFREE(z, c);
     fixed_built = 1;
   }
+#else
+  z=z;
 #endif
   *bl = fixed_bl;
   *bd = fixed_bd;