Don't allocate the buffer on early error.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29559 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/userlandfs/kernel_add_on/KernelRequestHandler.cpp

@@ -671,10 +671,13 @@ KernelRequestHandler::_HandleRequest(FileCacheReadRequest* request)
 	}
 #else
 	// allocate a buffer
-	void* buffer = malloc(size);
+	void* buffer = NULL;
-		// TODO: Limit size!
+	if (result == B_OK) {
-	if (buffer == NULL)
+		buffer = malloc(size);
-		result = B_NO_MEMORY;
+			// TODO: Limit size!
+		if (buffer == NULL)
+			result = B_NO_MEMORY;
+	}
 	MemoryDeleter _2(buffer);
 
 	// execute the request