gcc warns:

    make[4]: Entering directory `./NetworkManager/libnm-util'
      CC       nm-value-transforms.lo
    nm-value-transforms.c: In function '_nm_utils_convert_op_array_to_string':
    nm-value-transforms.c:121:6: error: assuming signed overflow does not occur when simplifying conditional to constant [-Werror=strict-overflow]
       if (i > 0)
          ^
    nm-value-transforms.c: In function '_nm_utils_convert_string_array_to_string':
    nm-value-transforms.c:121:6: error: assuming signed overflow does not occur when simplifying conditional to constant [-Werror=strict-overflow]
       if (i > 0)
          ^

    make[7]: Entering directory `./NetworkManager/src/settings/plugins/ifcfg-rh'
      CC       reader.lo
    reader.c: In function 'make_wired_setting':
    reader.c:3295:6: error: assuming signed overflow does not occur when simplifying conditional to constant [-Werror=strict-overflow]
       if (!found)
          ^
    reader.c: In function 'wireless_connection_from_ifcfg':
    reader.c:3295:6: error: assuming signed overflow does not occur when simplifying conditional to constant [-Werror=strict-overflow]
       if (!found)
          ^

Signed-off-by: Thomas Haller <thaller@redhat.com>