fix sprintf overflow

[zviratko]

fixes the following by truncating lat/lon to 14b, should be more than enough

applications_user/flipperLight/src/screen_wardrive.c: In function 'wardrive_parse_fix_coords.constprop':
applications_user/flipperLight/src/screen_wardrive.c:180:36: error: 'snprintf' output may be truncated before the last format character [-Werror=format-truncation=]
  180 |     snprintf(out, out_size, "%s, %s", lat, lon);
      |                                    ^
applications_user/flipperLight/src/screen_wardrive.c:180:5: note: 'snprintf' output between 3 and 33 bytes into a destination of size 32
  180 |     snprintf(out, out_size, "%s, %s", lat, lon);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
    LINK    build/f7-firmware-C/.extapps/cli_bt_d.elf
scons: *** [build/f7-firmware-C/.extapps/c5lab_dev/src/screen_wardrive.o] Error 1