fix bug with fmt(x, 'a').

Reference: /n/atom/patch/applied/acidfmtsize
Date: Thu Feb 20 02:44:09 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/acid/expr.c	Thu Feb 20 02:43:56 2014
+++ /sys/src/cmd/acid/expr.c	Thu Feb 20 02:43:57 2014
@@ -6,7 +6,7 @@
 #define Extern extern
 #include "acid.h"
 
-int fsize[] =
+static int fsize[] =
 {
 //	['A'] 4,
 	['B'] 4,
@@ -41,19 +41,30 @@
 };
 
 int
-fmtsize(Value *v)
+fmtcharsize(int c)
 {
 	int ret;
 
-	switch(v->fmt) {
+	switch(c) {
 	default:
-		assert(v->fmt < nelem(fsize));
-		ret = fsize[v->fmt];
+		assert(c < nelem(fsize));
+		ret = fsize[c];
 		assert(ret>0 && ret<32);
 		return ret;
 	case 'a':
 	case 'A':
 		return mach->szaddr;
+	}
+}
+
+int
+fmtsize(Value *v)
+{
+	int ret;
+
+	switch(v->fmt) {
+	default:
+		return fmtcharsize(v->fmt);
 	case 'i':
 	case 'I':
 		if(v->type != TINT || machdata == 0)
--- /sys/src/cmd/acid/acid.h	Thu Feb 20 02:43:59 2014
+++ /sys/src/cmd/acid/acid.h	Thu Feb 20 02:43:59 2014
@@ -58,6 +58,7 @@
 extern void	(*expop[])(Node*, Node*);
 #define expr(n, r) (r)->comt=0; (*expop[(n)->op])(n, r);
 extern int	fmtsize(Value *v) ;
+extern int	fmtcharsize(int) ;
 
 enum
 {