strncat error in function infoHF_EMRTD_offline causing compile error.

[NathanielJS1541]

Compilation problems Try compiling with verbose. make VERBOSE=1 with main makefile or make V=1 with cmake.

Describe the bug When I try to compile the latest master on Raspbain or Debian, I get the following compile error:

[-] CC src/cmdhfemrtd.c
mkdir -p obj/
gcc -MT obj/cmdhfemrtd.o -MMD -MP -MF obj/cmdhfemrtd.Td -Wall -Werror -O3 -fstrict-aliasing -pipe -Wbad-function-cast -Wredundant-decls -Wmissing-prototypes -Wchar-subscripts -Wshadow -Wundef -Wwrite-strings -Wunused -Wuninitialized -Wpointer-arith -Winline -Wformat -Wformat-security -Winit-self -Wmissing-include-dirs -Wnested-externs -Wmissing-declarations -Wempty-body -Wignored-qualifiers -Wmissing-field-initializers -Wtype-limits -Wold-style-definition -Wcast-align -Wno-error=cast-align -Wswitch-enum -Wno-error=switch-enum -Wstrict-prototypes -I./src -I./include -I../include -I../common -I../common_fpga -I./deps/amiitool -I./deps/cliparser -I./deps/hardnested -I./deps/jansson -I./deps/liblua -I../common/mbedtls -I./deps/reveng -I./deps/tinycbor -I./deps/whereami   -DHAVE_READLINE -DHAVE_BLUEZ -DHAVE_LUA_SWIG -DHAVE_GUI -c -o obj/cmdhfemrtd.o src/cmdhfemrtd.c
src/cmdhfemrtd.c: In function ‘infoHF_EMRTD_offline’:
src/cmdhfemrtd.c:1556:5: error: ‘strncat’ specified bound 1 equals source length [-Werror=stringop-overflow=]
     strncat(filepath, PATHSEP, 1);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/cmdhfemrtd.c:1593:13: error: ‘strncat’ specified bound 1 equals source length [-Werror=stringop-overflow=]
             strncat(filepath, PATHSEP, 1);
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[1]: *** [Makefile:793: obj/cmdhfemrtd.o] Error 1
make: *** [Makefile:137: client/all] Error 2

This seems to affect Debian-based systems only. I have successfully compiled the latest master on Kali and in Proxspace.

To Reproduce Steps to reproduce the behaviour:

1. Use a Debian-based OS
2. install dependencies and git pull the latest master
3. make clean && make all
4. Error occurs.

Expected behaviour Compile should be successful.

Desktop (please complete the following information):

• OS: Raspbian GNU/Linux 10 (buster) and Debian GNU/Linux 10 (buster)

[doegox]

thanks for reporting, I'll push a fix