#18783: Projection Widget was not displayed without a pager

The shape was null, which was not handled internally

--HG--
branch : 1.x

src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs

@@ -113,7 +113,15 @@ namespace Orchard.ContentManagement.Drivers {
         }
 
         private ContentShapeResult ContentShapeImplementation(string shapeType, Func<BuildShapeContext, object> shapeBuilder) {
-            return new ContentShapeResult(shapeType, Prefix, ctx => AddAlternates(shapeBuilder(ctx), ctx));
+            return new ContentShapeResult(shapeType, Prefix, ctx => {
+                var shape = shapeBuilder(ctx);
+                                                                 
+                if(shape == null) {
+                    return null;
+                }
+
+                return AddAlternates(shape, ctx);;
+            });
         }
 
         private static dynamic AddAlternates(dynamic shape, BuildShapeContext ctx) {

src/Orchard/ContentManagement/Drivers/ContentShapeResult.cs

@@ -38,6 +38,11 @@ namespace Orchard.ContentManagement.Drivers {
 
             var newShape = _shapeBuilder(context);
 
+            // ignore it if the driver returned a null shape
+            if(newShape == null) {
+                return;
+            }
+
             // add a ContentPart property to the final shape 
             if (ContentPart != null && newShape.ContentPart == null) {
                 newShape.ContentPart = ContentPart;