nginx-rtmp build error

	../nginx-rtmp-module-dev/ngx_rtmp_init.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I../nginx-rtmp-module-dev  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I ../nginx-rtmp-module-dev \
	-o objs/addon/nginx-rtmp-module-dev/ngx_rtmp_handshake.o \
	../nginx-rtmp-module-dev/ngx_rtmp_handshake.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I../nginx-rtmp-module-dev  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I ../nginx-rtmp-module-dev \
	-o objs/addon/nginx-rtmp-module-dev/ngx_rtmp_handler.o \
	../nginx-rtmp-module-dev/ngx_rtmp_handler.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I../nginx-rtmp-module-dev  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I ../nginx-rtmp-module-dev \
	-o objs/addon/nginx-rtmp-module-dev/ngx_rtmp_amf.o \
	../nginx-rtmp-module-dev/ngx_rtmp_amf.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I../nginx-rtmp-module-dev  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I ../nginx-rtmp-module-dev \
	-o objs/addon/nginx-rtmp-module-dev/ngx_rtmp_send.o \
	../nginx-rtmp-module-dev/ngx_rtmp_send.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I../nginx-rtmp-module-dev  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I ../nginx-rtmp-module-dev \
	-o objs/addon/nginx-rtmp-module-dev/ngx_rtmp_shared.o \
	../nginx-rtmp-module-dev/ngx_rtmp_shared.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I../nginx-rtmp-module-dev  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules -I ../nginx-rtmp-module-dev \
	-o objs/addon/nginx-rtmp-module-dev/ngx_rtmp_eval.o \
	../nginx-rtmp-module-dev/ngx_rtmp_eval.c
../nginx-rtmp-module-dev/ngx_rtmp_eval.c: In function ‘ngx_rtmp_eval’:
../nginx-rtmp-module-dev/ngx_rtmp_eval.c:160:17: error: this statement may fall through [-Werror=implicit-fallthrough=]
                 switch (c) {
                 ^~~~~~
../nginx-rtmp-module-dev/ngx_rtmp_eval.c:170:13: note: here
             case ESCAPE:
             ^~~~
cc1: all warnings being treated as errors
make[1]: *** [objs/Makefile:1351: objs/addon/nginx-rtmp-module-dev/ngx_rtmp_eval.o] Error 1
make[1]: Leaving directory '/home/bertino/nginx-1.15.5'
make: *** [Makefile:8: build] Error 2