change _p9pow10 to fmtpow10
diff --git a/src/lib9/fmt/fltfmt.c b/src/lib9/fmt/fltfmt.c
index 2604e4f..8afd024 100644
--- a/src/lib9/fmt/fltfmt.c
+++ b/src/lib9/fmt/fltfmt.c
@@ -55,7 +55,7 @@
 	1e150, 1e151, 1e152, 1e153, 1e154, 1e155, 1e156, 1e157, 1e158, 1e159, 
 };
 
-#define  pow10(x)  _p9pow10(x)
+#define  pow10(x)  fmtpow10(x)
 
 static double
 pow10(int n)