* Fix build of app_server test environment by implementing atomic_get(),

maybe this should be the assembler version we use for x86, but is probably
  fine for the purpose of the test environment (only BString uses this)
* Fix semantics of DrawingEngine::CopyToFront() which I recently introduced,
  for the fake accelerant of the test environment, we do need to call
  Invalidate(), not CopyBackToFront() directly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24422 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/build/libhaikucompat/misc.cpp

@@ -35,3 +35,11 @@ fs_unmount_volume(const char *path, uint32 flags)
 	return B_ERROR;
 }
 
+
+int32
+atomic_get(vint32 *value)
+{
+	return *value;
+}
+
+

src/servers/app/drawing/DrawingEngine.cpp

@@ -190,7 +190,7 @@ DrawingEngine::CopyToFront(/*const*/ BRegion& region)
 {
 	int32 count = region.CountRects();
 	for (int32 i = 0; i < count; i++)
-		fGraphicsCard->CopyBackToFront(region.RectAt(i));
+		fGraphicsCard->Invalidate(region.RectAt(i));
 }