make safe for new package local defaults

R=r
DELTA=462  (9 added, 33 deleted, 420 changed)
OCL=22879
CL=22885
diff --git a/src/lib/strconv/ftoa.go b/src/lib/strconv/ftoa.go
index b99d9d5..a0f5efc 100644
--- a/src/lib/strconv/ftoa.go
+++ b/src/lib/strconv/ftoa.go
@@ -28,7 +28,7 @@
 func Max(a, b int) int
 func RoundShortest(d *Decimal, mant uint64, exp int, flt *FloatInfo)
 
-func FloatSize() int {
+func floatsize() int {
 	// Figure out whether float is float32 or float64.
 	// 1e-35 is representable in both, but 1e-70
 	// is too small for a float32.
@@ -38,7 +38,7 @@
 	}
 	return 64;
 }
-export var floatsize = FloatSize()
+export var FloatSize = floatsize()
 
 export func ftoa32(f float32, fmt byte, prec int) string {
 	return GenericFtoa(uint64(sys.float32bits(f)), fmt, prec, &float32info);
@@ -49,7 +49,7 @@
 }
 
 export func ftoa(f float, fmt byte, prec int) string {
-	if floatsize == 32 {
+	if FloatSize == 32 {
 		return ftoa32(float32(f), fmt, prec);
 	}
 	return ftoa64(float64(f), fmt, prec);