android/avrcp: Fix clang warning

Check len before memcpy(). Fixes:
...
android/avrcp-lib.c:885:3: warning: Null pointer passed as an argument
to a 'nonnull' parameter
                memcpy(&ptr[4], text[i], len);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...

diff --git a/android/avrcp-lib.c b/android/avrcp-lib.c
index ec5ffdb..c01ccbb 100644 (file)
--- a/android/avrcp-lib.c
+++ b/android/avrcp-lib.c
@@ -1964,7 +1964,10 @@ int avrcp_get_player_attribute_text_rsp(struct avrcp *session,
                ptr[0] = attrs[i];
                put_be16(AVRCP_CHARSET_UTF8, &ptr[1]);
                ptr[3] = len;
-               memcpy(&ptr[4], text[i], len);
+
+               if (len)
+                       memcpy(&ptr[4], text[i], len);
+
                ptr += 4 + len;
                length += 4 + len;
        }