--- pnggccrd.c.bak	Wed May 16 03:52:23 2007
+++ pnggccrd.c	Mon May 21 13:04:54 2007
@@ -359,6 +359,7 @@
    _pctemp = _pctemp;
    _MMXLength = _MMXLength;
 #endif
+#if 0
    _const4  = _const4;
    _const6  = _const6;
    _mask8_0  = _mask8_0;
@@ -377,6 +378,7 @@
    _mask48_2 = _mask48_2;
    _mask48_1 = _mask48_1;
    _mask48_0 = _mask48_0;
+#endif
 }
 #endif /* PNG_MMX_CODE_SUPPORTED */