Instead of the new_intrusive<T>() functions, use intrusive(new T)

This means we no longer need 8 different functions for different numbers of arguments, and non-const references can now also be passed to constructors without problems.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1443 0fc631ac-6414-0410-93d0-97cfa31319b6

src/gui/value/choice.cpp

@@ -203,9 +203,9 @@ void DropDownChoiceListBase::generateThumbnailImages() {
 				status = THUMB_OK; // no need to rebuild
 			} else if (img.isReady()) {
 				// request this thumbnail
-				thumbnail_thread.request( new_intrusive4<ChoiceThumbnailRequest>(
+				thumbnail_thread.request( intrusive(new ChoiceThumbnailRequest(
 						&cve, i, status == THUMB_NOT_MADE && !img.local(), img.threadSafe()
-					));
+					)));
 			}
 		}
 	}