Credits: fix missing caret return if the file misses newline at EOL

The bug was caused by migrating to Q_strncpy (strlcpy), which always inserts
zero terminator at the end of the buffer. But the ugly parser below this code
expects a caret return.

Author: a1batross

menus/Credits.cpp

@@ -168,7 +168,7 @@ void CMenuCredits::_Init( void )
 				memcpy( tmp, buffer, count );
 				EngFuncs::COM_FreeFile( buffer );
 				buffer = tmp;
-				Q_strncpy( buffer + count, "\r", 1 ); // add terminator
+				Q_strncpy( buffer + count, "\r", 2 ); // add terminator
 				count += 2; // added "\r\0"
 			}
 			p = buffer;