Enhance readability when accessing static members

The sole purpose of a few objects was calling a static member of the
class they belonged to. This is not needed, as you can access a static
member with the <class_name>::<member_name> notation.

src/sshagent/BinaryStream.cpp

@@ -151,7 +151,7 @@ bool BinaryStream::readString(QString& str)
         return false;
     }
 
-    str = str.fromLatin1(ba);
+    str = QString::fromLatin1(ba);
     return true;
 }