change string([]byte) to pass array, rather than &a[0],

to string convert.  if the byte array has length 0,
the computation of &a[0] throws an index bounds error.

for fixed size arrays, this ends up invoking arrays2d
unnecessarily, but it works.

R=ken
DELTA=304  (44 added, 28 deleted, 232 changed)
OCL=15674
CL=15678

1 files changed, 9 insertions, 0 deletions

diff --git a/src/runtime/string.c b/src/runtime/string.c
index 27a7581094..fec66f8a82 100644
--- a/src/runtime/string.c
+++ b/src/runtime/string.c
@@ -164,3 +164,12 @@ sys·byteastring(byte *a, int32 l, string s)
 	mcpy(s->str, a, l);
 	FLUSH(&s);
 }
+
+void
+sys·arraystring(Array *b, string s)
+{
+	s = mal(sizeof(s->len)+b->nel);
+	s->len = b->nel;
+	mcpy(s->str, b->array, s->len);
+	FLUSH(&s);
+}