enhanced code

- changed qse_strfcpy() and qse_strxfcpy() to accept a string array
- removed the data field from qse_awk_prm_t
- made relevant changes

qse/lib/awk/awk.h

@@ -87,7 +87,7 @@ struct qse_awk_t
 {
 	qse_mmgr_t*    mmgr;
 	qse_ccls_t*    ccls;
-	qse_awk_prm_t* prm;
+	qse_awk_prm_t  prm;
 
 	/* options */
 	int option;