Update ds3_request_set_max_keys to clear out the max_keys buffer prior

to writing to it.

Author: robertgrimm

src/ds3.c

@@ -553,6 +553,7 @@ void ds3_request_set_marker(ds3_request* _request, const char* marker) {
 
 void ds3_request_set_max_keys(ds3_request* _request, uint32_t max_keys) {
     char max_keys_s[11];
+    memset(max_keys_s, 0, sizeof(char) * 11);
     g_snprintf(max_keys_s, sizeof(char) * 11, "%u", max_keys);
     _set_query_param(_request, "max-keys", max_keys_s);
 }