Fixed Safari related JavaScript issue

Changelog

@@ -1,5 +1,9 @@
 Changelog:
 
+V1.13 December 3rd, 2016
+
+	* Fixed Safari related JavaScript issue
+
 V1.12 December 3rd, 2016
 
 	* Made model editor's raft display more efficient

README.md

@@ -4,7 +4,7 @@
 ### Description
 M33 Fio is a general purpose plugin for [OctoPrint](http://octoprint.org/) that extends its capabilities to include many useful feature like the ability to use a Micro 3D printer, modify a model before printing it, host a webcam stream, and much more.
 
-The latest version of M33 Fio is V1.12 released on December 3rd, 2016, and an entire changelog for it can be found [here](https://raw.githubusercontent.com/donovan6000/M33-Fio/master/Changelog).
+The latest version of M33 Fio is V1.13 released on December 3rd, 2016, and an entire changelog for it can be found [here](https://raw.githubusercontent.com/donovan6000/M33-Fio/master/Changelog).
 
 ### Features
 * Adds a model viewer tab to OctoPrint's interface where any uploaded model can be viewed

octoprint_m33fio/static/js/m33fio.js

@@ -1427,19 +1427,23 @@ $(function() {
 				// Update grid
 				updateGrid: function() {
 
-					// Check if grid already exists
-					if(modelViewer.grid !== null) {
+					// Check if model viewer was created
+					if(modelViewer.scene !== null) {
+
+						// Check if grid already exists
+						if(modelViewer.grid !== null) {
 
-						// Remove grid from scene
-						modelViewer.scene.remove(modelViewer.grid);
-						modelViewer.grid = null;
-					}
+							// Remove grid from scene
+							modelViewer.scene.remove(modelViewer.grid);
+							modelViewer.grid = null;
+						}
 
-					// Create grid
-					modelViewer.grid = createGrid(self.printerProfile.currentProfileData().volume.width(), self.printerProfile.currentProfileData().volume.depth(), self.printerProfile.currentProfileData().volume.formFactor(), self.printerProfile.currentProfileData().volume.origin());
+						// Create grid
+						modelViewer.grid = createGrid(self.printerProfile.currentProfileData().volume.width(), self.printerProfile.currentProfileData().volume.depth(), self.printerProfile.currentProfileData().volume.formFactor(), self.printerProfile.currentProfileData().volume.origin());
 
-					// Add grid to scene
-					modelViewer.scene.add(modelViewer.grid);
+						// Add grid to scene
+						modelViewer.scene.add(modelViewer.grid);
+					}
 				},
 
 				// Load model

setup.py

@@ -14,7 +14,7 @@
 plugin_name = "OctoPrint-M33Fio"
 
 # The plugin's version. Can be overwritten within OctoPrint's internal data via __plugin_version__ in the plugin module
-plugin_version = "1.12"
+plugin_version = "1.13"
 
 # The plugin's description. Can be overwritten within OctoPrint's internal data via __plugin_description__ in the plugin
 # module