runtime: fix float64 hash

R=ken2
CC=golang-dev
https://golang.org/cl/5580046

diff --git a/src/pkg/runtime/alg.c b/src/pkg/runtime/alg.c
index 56ec2d69e698a3aaba28844a36d2ccd7ff480859..eec523aad4dd589449d5175ae63d7a6938df5058 100644 (file)
--- a/src/pkg/runtime/alg.c
+++ b/src/pkg/runtime/alg.c
@@ -263,7 +263,7 @@ runtime·f64hash(uintptr *h, uintptr s, void *a)
        uint64 u;
 
        USED(s);
-       f = *(float32*)a;
+       f = *(float64*)a;
        if(f == 0)
                hash = 0;       // +0, -0
        else if(f != f)