[PATCH BlueZ] shared/bap: Fix scan-build warning

[Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx>]

From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>

This fixes the following warning:

src/shared/bap.c:2268:26: warning: Access to field 'iov_len' results in
a dereference of a null pointer (loaded from variable 'cont')
        return iov_append(data, cont->iov_len, cont->iov_base);
	                                ^~~~~~~~~~~~~
---
 src/shared/bap.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/shared/bap.c b/src/shared/bap.c
index 0cafb75e69d0..88697988e991 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -2261,6 +2261,12 @@ static void *ltv_merge(struct iovec *data, struct iovec *cont)
 {
 	uint8_t delimiter = 0;
 
+	if (!data)
+		return NULL;
+
+	if (!cont || !cont->iov_len || !cont->iov_base)
+		return data->iov_base;
+
 	iov_append(data, sizeof(delimiter), &delimiter);
 
 	return iov_append(data, cont->iov_len, cont->iov_base);
-- 
2.37.3