Use more gcc attributes

git-svn-id: svn://svn.cc65.org/cc65/trunk@289 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/common/cmdline.c

@@ -95,7 +95,7 @@ void InitCmdLine (unsigned aArgCount, char* aArgVec[], const char* aProgName)
 
 
 void UnknownOption (const char* Opt)
-/* Print an error about an unknown option. */
+/* Print an error about an unknown option and die. */
 {
     AbEnd ("Unknown option: %s\n", Opt);
 }