[PATCH 2/2] builtin/unpack-objects.c: fix compiler error on MacOS with clang 11.0.0

["Jeff Hostetler via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>

Add an extra set of braces around zero initialization of the `zstream`
variable to resolve compiler error/warning from clang 11.0.0 on MacOS.
This is not needed on clang 14.0.

$ make builtin/unpack-objects.o
    CC builtin/unpack-objects.o
builtin/unpack-objects.c:388:26: error: suggest braces around \
		initialization of subobject [-Werror,-Wmissing-braces]
        git_zstream zstream = { 0 };
                                ^
                                {}
1 error generated.
make: *** [builtin/unpack-objects.o] Error 1

Signed-off-by: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
---
 builtin/unpack-objects.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 43789b8ef29..4b16f1592ba 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -385,7 +385,7 @@ static const void *feed_input_zstream(struct input_stream *in_stream,
 
 static void stream_blob(unsigned long size, unsigned nr)
 {
-	git_zstream zstream = { 0 };
+	git_zstream zstream = { { 0 } };
 	struct input_zstream_data data = { 0 };
 	struct input_stream in_stream = {
 		.read = feed_input_zstream,
-- 
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