Fix macro output in the listing

git-svn-id: svn://svn.cc65.org/cc65/trunk@141 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ca65/istack.h

@@ -53,7 +53,10 @@ void PopInput (void);
 int InputFromStack (void);
 /* Try to get input from the input stack. Return true if we had such input,
  * return false otherwise.
- */			  
+ */
+
+int HavePushedInput (void);
+/* Return true if we have stacked input available, return false if not */
 
 void CheckInputStack (void);
 /* Called from the scanner before closing an input file. Will check for any