axis: Fix reload of preview after touch off

.. see the added comment for more information

Close: #269

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

src/emc/usr_intf/axis/scripts/axis.py

@@ -1180,7 +1180,12 @@ def open_file_guts(f, filtered=False, addrecent=True):
                 if s.axis_mask & (1<<i):
                     position += " %s%.8f" % ("XYZABCUVW"[i], s.position[i])
             initcodes.append(position)
-            for g in s.gcodes[1:]:
+            for i, g in enumerate(s.gcodes):
+                # index 0 is "sequence number" and index 2 is the last block's
+                # "g_mode" neither of which should be sent as a startup code.
+                # In particular, after issuing a non-modal G like G10, that
+                # will appear at s.gcodes[2] which caused issue #269
+                if i in (0, 2): continue
                 if g == -1: continue
                 initcodes.append("G%.1f" % (g * .1))
             tool_offset = "G43.1"