does not compile on ubuntu 16.04

[m2049r]

$ make
GIT version.h
CC cdcacm.c
CC hid.c
CC hex_utils.c
CC flash.c
CC main.c
main.c:99:67: error: missing braces around initializer [-Werror=missing-braces]
static struct composite_report packet_buffer[1024 / sizeof(struct composite_report)] = {0};
^
main.c:99:67: error: (near initialization for 'packet_buffer[0]') [-Werror=missing-braces]
cc1: all warnings being treated as errors
Makefile:49: recipe for target 'main.o' failed
make: *** [main.o] Error 1