Fix AST start lineno for list nodes

If the node is initialized with children, check if a child has a
lower start lineno, similar to what we do for fixed-sized nodes
as well.

Zend/zend_ast.c

@@ -155,7 +155,14 @@ ZEND_API zend_ast *zend_ast_create_list(uint32_t init_children, zend_ast_kind ki
 		uint32_t i;
 		va_start(va, kind);
 		for (i = 0; i < init_children; ++i) {
-			ast = zend_ast_list_add(ast, va_arg(va, zend_ast *));
+			zend_ast *child = va_arg(va, zend_ast *);
+			ast = zend_ast_list_add(ast, child);
+			if (child != NULL) {
+				uint32_t lineno = zend_ast_get_lineno(child);
+				if (lineno < ast->lineno) {
+					ast->lineno = lineno;
+				}
+			}
 		}
 		va_end(va);
 	}