Merge pull request #2182 from kantlivelong/invalid_tool_temp_fix

Handle non-[existent/functioning] tools

src/octoprint/static/js/app/viewmodels/temperature.js

@@ -210,6 +210,9 @@ $(function() {
                 if (lastData.hasOwnProperty("tool" + i)) {
                     tools[i]["actual"](lastData["tool" + i].actual);
                     tools[i]["target"](lastData["tool" + i].target);
+                } else {
+                    tools[i]["actual"](0);
+                    tools[i]["target"](0);
                 }
             }
 

src/octoprint/util/comm.py

@@ -2604,7 +2604,7 @@ class MachineCom(object):
 		if not match and support_r:
 			match = regexes_parameters["floatR"].search(cmd)
 
-		if match:
+		if match and self.last_temperature.tools.get(toolNum) is not None:
 			try:
 				target = float(match.group("value"))
 				self.last_temperature.set_tool(toolNum, target=target)