handle case where there is no export set

- allow user to export to a new file
- also check if selection contains the set itself

Author: vkovec

Assets/Integrations/Autodesk/maya/scripts/unityCommands.mel

@@ -244,7 +244,9 @@ global proc unityExport(){
             continue;
         }
 
-        if(`sets -isIntersecting $exportSet $selectedSetList`){
+        if(`sets -isIntersecting $exportSet $selectedSetList` ||
+            stringArrayContains($exportSet, $origSelection)){
+            
             $setsToExport[$i] = $exportSet;
             $i++;
         }
@@ -253,6 +255,12 @@ global proc unityExport(){
     // delete temporary selection set
     delete $selectedSet;
 
+    // if selection doesn't belong to a set, export to a new file
+    if(size($setsToExport) <= 0){
+        eval "SendToUnitySelection";
+        return;
+    }
+    
     for($unitySet in $setsToExport){
         print ("exporting set: " + $unitySet);