insert line break only if there is something to break into the next line

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/boxes/LineArrangement.java b/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/boxes/LineArrangement.java
index e718f56..851d503 100644
--- a/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/boxes/LineArrangement.java
+++ b/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/boxes/LineArrangement.java
@@ -95,9 +95,9 @@
 		}
 		if (tail.getWidth() > 0) {
 			insertNextBox(tail);
+			lineBreak();
 		}
 
-		lineBreak();
 		return lastChildWrappedCompletely;
 	}
 
@@ -123,9 +123,9 @@
 		}
 		if (tail.getWidth() > 0) {
 			insertNextBox(tail);
+			lineBreak();
 		}
 
-		lineBreak();
 		return boxWrappedCompletely;
 	}