move cursor into the first line also for one-liners

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/cursor/MoveDown.java b/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/cursor/MoveDown.java
index ad84e93..df90bb0 100644
--- a/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/cursor/MoveDown.java
+++ b/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/cursor/MoveDown.java
@@ -48,7 +48,7 @@
 			final IContentBox firstChild = getFirstContentBoxChild(currentBox);
 			if (firstChild != null) {
 				if (containsInlineContent(currentBox)) {
-					return findOffsetInNextBoxBelow(graphics, currentOffset, firstChild, preferredX, hotArea.getY() + hotArea.getHeight() - 1);
+					return findOffsetInNextBoxBelow(graphics, currentOffset, firstChild, preferredX, hotArea.getY() - 1);
 				} else if (containsInlineContent(firstChild)) {
 					return findOffsetInNextBoxBelow(graphics, currentOffset, firstChild, preferredX, currentBox.getAbsoluteTop() - 1);
 				} else {