Fixed alert by lgtm

sea5kg · sea5kg · commit 56fc0285989c · 2021-04-12T10:12:14.000+07:00
diff --git a/src/md5.cpp b/src/md5.cpp
@@ -347,7 +347,7 @@ std::string MD5::hexdigest() const
  
 //////////////////////////////
  
-std::ostream& operator<<(std::ostream& out, MD5 &md5)
+std::ostream& operator<<(std::ostream& out, const MD5 &md5)
 {
   return out << md5.hexdigest();
 }

Original file line number	Diff line number	Diff line change
`@@ -347,7 +347,7 @@ std::string MD5::hexdigest() const`
`347`	`347`
`348`	`348`	`//////////////////////////////`
`349`	`349`
`350`		`-std::ostream& operator<<(std::ostream& out, MD5 &md5)`
	`350`	`+std::ostream& operator<<(std::ostream& out, const MD5 &md5)`
`351`	`351`	`{`
`352`	`352`	`return out << md5.hexdigest();`
`353`	`353`	`}`