Require rvalue for Handle::Unmanage

Sources/Client/GameMap.cpp

@@ -592,7 +592,7 @@ namespace spades {
 				}
 			}
 
-			return map.Unmanage();
+			return std::move(map).Unmanage();
 		}
 	} // namespace client
 } // namespace spades

Sources/Client/GameMapLoader.cpp

@@ -142,7 +142,7 @@ namespace spades {
 			SPAssert(result);
 
 			if (result->gameMap) {
-				return result->gameMap.Unmanage();
+				return std::move(result->gameMap).Unmanage();
 			} else {
 				std::rethrow_exception(result->exceptionThrown);
 			}

Sources/Core/RefCountedObject.h

@@ -94,7 +94,7 @@ namespace spades {
 			if (ptr)
 				ptr->AddRef();
 		}
-		Handle(Handle<T> &&h) : ptr(h.MaybeUnmanage()) {}
+		Handle(Handle<T> &&h) : ptr(std::move(h).MaybeUnmanage()) {}
 		Handle(T &ref) : ptr{&ref} { ptr->AddRef(); }
 		Handle(stmp::optional<T &> ref) : ptr{ref.get_pointer()} { if (ptr)
 				ptr->AddRef();
@@ -158,7 +158,7 @@ namespace spades {
 		 * Convert a `Handle` to a raw pointer, transfering the ownership.
 		 * Throws an exception if the `Handle` is null.
 		 */
-		T *Unmanage() {
+		T *Unmanage() && {
 			SPAssert(ptr != NULL);
 			T *p = ptr;
 			ptr = NULL;
@@ -167,7 +167,7 @@ namespace spades {
 		/**
 		 * Convert a `Handle` to a raw pointer, transfering the ownership.
 		 */
-		T *MaybeUnmanage() {
+		T *MaybeUnmanage() && {
 			T *p = ptr;
 			ptr = NULL;
 			return p;

Sources/Core/SdlImageReader.cpp

@@ -79,7 +79,7 @@ namespace spades {
 						inPixels += pitch;
 					}
 				}
-				return bmp.Unmanage();
+				return std::move(bmp).Unmanage();
 			} catch (...) {
 				throw;
 			}

Sources/Core/VoxelModelLoader.cpp

@@ -124,6 +124,6 @@ namespace spades {
 			voxelModel->ForceMaterial(*meta.forceMaterial);
 		}
 
-		return voxelModel.Unmanage();
+		return std::move(voxelModel).Unmanage();
 	}
 } // namespace spades

Sources/Draw/GLFlatMapRenderer.cpp

@@ -72,7 +72,7 @@ namespace spades {
 			} catch (...) {
 				throw;
 			}
-			return bmp.Unmanage();
+			return std::move(bmp).Unmanage();
 		}
 
 		void GLFlatMapRenderer::GameMapChanged(int x, int y, int z, client::GameMap *map) {