OS2 bits

Ronald Van Iwaarden wrote:
... lines 1845 and 1846 of cmd.c generate a 'value out of range
warning' due to the compiler making 0x80 an integer rather than a character
and '|'ing it with the argument.  This requires a minor change to micro.h.
[ Makefile.os2 rev does not currently make sense in the trunk. ]

include/micro.h

@@ -14,7 +14,7 @@ extern int ramdisk;
 #define C(c)	(0x1f & (c))
 #endif
 #ifndef M
-#define M(c)	(0x80 | (c))
+#define M(c)	(((char)0x80) | (c))
 #endif
 #define ABORT C('a')