Added a more generic way to push sources that deliver a token stream

independent of the actual input from the file. Change macro handling
to use the new input stack.
Fixed an error in FreeIf: If an unexpected .ENDIF was reached, the
assembler started an endless loop printing error messages.


git-svn-id: svn://svn.cc65.org/cc65/trunk@24 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ca65/expr.c

@@ -39,11 +39,11 @@
 #include "global.h"
 #include "instr.h"
 #include "mem.h"
+#include "nexttok.h"
 #include "objcode.h"
 #include "objfile.h"
-#include "scanner.h"
 #include "symtab.h"
-#include "toknode.h"
+#include "toklist.h"
 #include "ulabel.h"
 #include "expr.h"