NEWT Multi-Monitor 1/2: Allow negative window position; Validate Screen-Index;

- Allow negative window position, using flag 'autoPosition' to mark a custom user position.
  This impacts Windows and X11 window creation code, which supports native auto positioning.

- Screen: Validate Screen-Index.
  In 'big-desktop' mode the Screen index is always 0. This is true for X11 with
  Xinerama enabled and MS-Windows in general.
  Platforms w/o multiple Screen support always use index 0.

- X11: Separate X11 Display/Screen/Window native code in their respective C files

- Windows test scripts: use '%*' to catch all arguments

- Add missing (c)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/newt/native/KDWindow.c b/src/newt/native/KDWindow.c
index 5f1affed1..e6bc7952e 100644
--- a/src/newt/native/KDWindow.c
+++ b/src/newt/native/KDWindow.c
@@ -256,7 +256,7 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_kd_KDWindow_RealizeWindow
     jint res = kdRealizeWindow(w, &nativeWindow);
     if(res) {
         fprintf(stderr, "[RealizeWindow] failed: 0x%X, 0x%X\n", res, kdGetError());
-        nativeWindow = NULL;
+        nativeWindow = 0;
     }
     DBG_PRINT( "[RealizeWindow] ok: %p\n", nativeWindow);
     return (jlong) (intptr_t) nativeWindow;