cmd/compile: change defaultlit2's force param to bool

Change-Id: I5546c4e8092ef61648cdae9c04288bb7d6f32476
Reviewed-on: https://go-review.googlesource.com/20084
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/compile/internal/gc/const.go

@@ -1349,7 +1349,7 @@ num:
 // if they're both ideal going in they better
 // get the same type going out.
 // force means must assign concrete (non-ideal) type.
-func defaultlit2(lp **Node, rp **Node, force int) {
+func defaultlit2(lp **Node, rp **Node, force bool) {
 	l := *lp
 	r := *rp
 	if l.Type == nil || r.Type == nil {
@@ -1365,9 +1365,10 @@ func defaultlit2(lp **Node, rp **Node, force int) {
 		return
 	}
 
-	if force == 0 {
+	if !force {
 		return
 	}
+
 	if l.Type.Etype == TBOOL {
 		Convlit(lp, Types[TBOOL])
 		Convlit(rp, Types[TBOOL])

src/cmd/compile/internal/gc/typecheck.go

@@ -567,7 +567,7 @@ OpSwitch:
 		}
 
 		// ideal mixed with non-ideal
-		defaultlit2(&l, &r, 0)
+		defaultlit2(&l, &r, false)
 
 		n.Left = l
 		n.Right = r
@@ -640,7 +640,7 @@ OpSwitch:
 		}
 
 		if t.Etype != TIDEAL && !Eqtype(l.Type, r.Type) {
-			defaultlit2(&l, &r, 1)
+			defaultlit2(&l, &r, true)
 			if n.Op == OASOP && n.Implicit {
 				Yyerror("invalid operation: %v (non-numeric type %v)", n, l.Type)
 				n.Type = nil
@@ -698,7 +698,7 @@ OpSwitch:
 			evconst(n)
 			t = idealbool
 			if n.Op != OLITERAL {
-				defaultlit2(&l, &r, 1)
+				defaultlit2(&l, &r, true)
 				n.Left = l
 				n.Right = r
 			}
@@ -1484,7 +1484,7 @@ OpSwitch:
 				n.Type = nil
 				return
 			}
-			defaultlit2(&l, &r, 0)
+			defaultlit2(&l, &r, false)
 			if l.Type == nil || r.Type == nil {
 				n.Type = nil
 				return