bitvec: avoid redundant zero-initialization in bitvec_alloc()

All the fields of the structure are set explicitly anyway.

Change-Id: I40c0322d5f2febd98bae6fbe0ec2132eda6fb35b
diff --git a/src/bitvec.c b/src/bitvec.c
index 2219b71..d7f32fb 100644
--- a/src/bitvec.c
+++ b/src/bitvec.c
@@ -400,7 +400,7 @@
  *  \return pointer to allocated vector; NULL in case of error */
 struct bitvec *bitvec_alloc(unsigned int size, TALLOC_CTX *ctx)
 {
-	struct bitvec *bv = talloc_zero(ctx, struct bitvec);
+	struct bitvec *bv = talloc(ctx, struct bitvec);
 	if (!bv)
 		return NULL;