checker: fix pub fn check

vlib/v/checker/checker.v

@@ -135,7 +135,7 @@ fn (mut c Checker) check_file_in_main(file ast.File) bool {
 						c.error('function `main` cannot return values', it.pos)
 					}
 				} else {
-					if it.is_pub {
+					if it.is_pub && !it.is_method {
 						c.warn('function `$it.name` $no_pub_in_main_warning', it.pos)
 					}
 				}

vlib/vweb/vweb.v

@@ -43,7 +43,7 @@ pub:
 	conn net.Socket
 	form map[string]string
 	// TODO Response
-mut:
+pub mut:
 	headers string // response headers
 	done bool
 }