there are too many powerpc operations for a uchar.
this doesn't affect existing .q files since it's an internal structure.

Reference: /n/sources/patch/applied/ql-as-range
Date: Fri Mar  2 17:19:38 CET 2007
Signed-off-by: forsyth@vitanuova.com

--- /sys/src/cmd/ql/l.h	Fri Mar  2 17:18:54 2007
+++ /sys/src/cmd/ql/l.h	Fri Mar  2 17:18:52 2007
@@ -50,7 +50,7 @@
 	short	line;
 	short	mark;
 	short	optab;		/* could be uchar */
-	uchar	as;
+	ushort	as;
 	char	reg;
 };
 struct	Sym
@@ -75,7 +75,7 @@
 };
 struct	Optab
 {
-	uchar	as;
+	ushort	as;
 	char	a1;
 	char	a2;
 	char	a3;