OCI_DEFAULT not defined in Oracle 7.

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=701

Reported by Fredrik Noring, Roxen Internet Software noring@roxen.com

config.log for Oracle 7/Solaris 2.5.1 says:

   configure:1258: checking for working Oracle libs
   configure:1275:
/home/distmaker/Distmaker/2.1/build/pike.sol2.5.1/build/smartlink gcc -c
-I/i/oracle/7.3.4/oci/include -I/i/oracle/7.3.4/rdbms/demo/
-I/i/oracle/7.3.4/rdbms/public/ -I/i/oracle/7.3.4/network/public/
-I/i/oracle/7.3.4/plsql/public -I/i/oracle/7.3.4/otrace/public
-I/home/distmaker/Distmaker/2.1/link/sol2.5.1/include -I/usr/local/include
-I/home/distmaker/Distmaker/2.1/build/pike.sol2.5.1/pike/src
-I/home/distmaker/Distmaker/2.1/build/pike.sol2.5.1/build conftest.c 1>&5
   configure:1266: oci.h: No such file or directory
   configure: failed program was:
   #line 1264 "configure"
   #include "confdefs.h"

#include <oci.h>

int main() {

     OCIInitialize(OCI_DEFAULT,0,0,0,0);

; return 0; }