tweak: safely check presence of current protocol (#171)

Greg Bowler · web-flow · commit 2cf71d3d0328 · 2022-09-26T19:22:26.000+01:00
diff --git a/src/Message.php b/src/Message.php
@@ -48,7 +48,7 @@ public function withProtocolVersion($version) {
 
 		$clone = clone $this;
 
-		if(strstr($clone->protocol, "/")) {
+		if(isset($clone->protocol) && strstr($clone->protocol, "/")) {
 			$versionStartPos = strpos(
 					$clone->protocol,
 					"/"
