Validate LinuxCNC tool length offsets

core/src/linuxcnc_tooldata_fixture.cpp

@@ -20,6 +20,7 @@ void cnc_sim_init_minimal_linuxcnc_tooldata() {
     tool.toolno = 1;
     tool.pocketno = 1;
     tool.diameter = 6.0;
+    tool.offset.tran.z = 12.5;
     tooldata_put(tool, 1);
     tooldata_last_index_set(1);
 }

core/tests/cnc_sim_api_linuxcnc_rs274_smoke.cpp

@@ -346,7 +346,7 @@ int main() {
                           (event.type == CNC_SIM_EVENT_COMMENT &&
                            event.line == 2 &&
                            event.reserved == 430 &&
-                           event.start.z == 0.0);
+                           near(event.start.z, 12.5));
         saw_tool_length_clear = saw_tool_length_clear ||
                                 (event.type == CNC_SIM_EVENT_COMMENT &&
                                  event.line == 3 &&