Ensure that getManifestIcon does not fail if manifest.icons member is missing

Author: f2bo

lib/platformBase.js

@@ -125,7 +125,7 @@ function PlatformBase (id, name, packageName, baseDir) {
   self.getManifestIcon = function (manifest, size) {
     // assumes icons are square
     var dimensions = size.toLowerCase().split('x');    
-    return manifest.icons[dimensions[0]];
+    return manifest.icons && manifest.icons[dimensions[0]];
   };
 
   /**