free errmsg & prevent leaks

ext/pdo_oci/oci_driver.c

@@ -63,6 +63,11 @@ ub4 _oci_error(OCIError *err, pdo_dbh_t *dbh, pdo_stmt_t *stmt, char *what, swor
 	
 	einfo = &H->einfo;
 
+	if (einfo->errmsg) {
+		pefree(einfo->errmsg, dbh->is_persistent);
+		einfo->errmsg = NULL;
+	}
+
 	if (stmt) {
 		S = (pdo_oci_stmt*)stmt->driver_data;
 		einfo = &S->einfo;
@@ -184,7 +189,12 @@ static int oci_handle_closer(pdo_dbh_t *dbh TSRMLS_DC) /* {{{ */
 		OCIHandleFree(H->env, OCI_HTYPE_ENV);
 		H->env = NULL;
 	}
-
+	
+	if (H->einfo.errmsg) {
+		pefree(H->einfo.errmsg, dbh->is_persistent);
+		H->einfo.errmsg = NULL;
+	}
+ 
 	pefree(H, dbh->is_persistent);
 
 	return 0;

ext/pdo_oci/oci_statement.c

@@ -81,6 +81,11 @@ static int oci_stmt_dtor(pdo_stmt_t *stmt TSRMLS_DC)
 		stmt->bound_params = NULL;
 	}
 	
+	if (S->einfo.errmsg) {
+		efree(S->einfo.errmsg);
+		S->einfo.errmsg = NULL;
+	}
+	
 	if (S->cols) {
 		for (i = 0; i < stmt->column_count; i++) {
 			if (S->cols[i].data) {