emc/tooldata/tooldata_common.cc:253:40 strncat truncates

[smoe]

A reminder.

emc/tooldata/tooldata_common.cc: In function ‘void tooldata_format_toolline(int, bool, CANON_TOOL_TABLE, char*)’:
emc/tooldata/tooldata_common.cc:253:40: warning: ‘char* __builtin_strncat(char*, const char*, long unsigned int)’ output may be truncated copying between 230 and 246 bytes from a string of length 254 [-Wstringop-truncation]
  253 |                                 strncat(formatted_line,tmp,space); \
      |                                        ^
emc/tooldata/tooldata_common.cc:262:5: note: in expansion of macro ‘F_ITEM’
  262 |     F_ITEM(diameter,       "D");
      |     ^~~~~~
emc/tooldata/tooldata_common.cc:253:40: warning: ‘char* __builtin_strncat(char*, const char*, long unsigned int)’ output may be truncated copying between 230 and 246 bytes from a string of length 254 [-Wstringop-truncation]
  253 |                                 strncat(formatted_line,tmp,space); \
      |                                        ^
emc/tooldata/tooldata_common.cc:262:5: note: in expansion of macro ‘F_ITEM’
  262 |     F_ITEM(diameter,       "D");