- added support for 64 bit version of mozilla SDK, thanks to thresh for the patch

configure.ac

@@ -5131,7 +5131,7 @@ then
   if test "${mozilla}" != "false"
   then
     build_pic=yes
-    AC_PATH_PROG(XPIDL, xpidl, no, ${xpidl_path} /usr/lib/mozilla)
+    AC_PATH_PROG(XPIDL, xpidl, no, ${xpidl_path}:/usr/lib/mozilla:/usr/lib64/mozilla)
     if test "${XPIDL}" = "no"; then
       AC_MSG_ERROR([Please install the Mozilla development tools, xpidl was not found.])
     fi