Fixed|OS X: Incorrect working directory with a developer build

If Doomsday was started without "-userdir", no one ensured that the
working directory was set to the App's native home. This meant that
files written using FS1 were created inside the build directory.

doomsday/client/src/unix/dd_uinit.cpp

@@ -42,6 +42,8 @@
 #include "filesys/fs_util.h"
 #include "dd_uinit.h"
 
+#include <de/App>
+
 #ifdef __CLIENT__
 #  include <de/DisplayMode>
 #endif
@@ -59,6 +61,9 @@ static void determineGlobalPaths(application_t* app)
 {
     assert(app);
 
+    // By default, make sure the working path is the home folder.
+    de::App::setCurrentWorkPath(de::App::app().nativeHomePath());
+
 #ifndef MACOSX
     if(getenv("HOME"))
     {