Fix a bad cast to char * that causes incorrect results on big endian.

[millert]

Now that awk stores chars as int we need to cast the Node * to int *.

Fixes the following script on big endian CPUs.

BEGIN { work="K"; gsub("[x]", "J", work); print work; }

Before fix:

JKJ

After:

K

Thanks to George Koehler for simplifying the test case.

[plan9]

thanks todd, appreciated.