no need to crash on empty expressions

svn path=/trunk/KDE/kdeedu/libkdeedu/; revision=799388

diff --git a/keduvocdocument/keduvocexpression.cpp b/keduvocdocument/keduvocexpression.cpp
index 94ceff28a5e5b32798cb65810e8d2deab93f5e55..37f9f075eb1b28754f2738eb63bb731dae74484f 100644 (file)
--- a/keduvocdocument/keduvocexpression.cpp
+++ b/keduvocdocument/keduvocexpression.cpp
@@ -109,7 +109,9 @@ KEduVocExpression::KEduVocExpression(const KEduVocExpression & other)
 
 KEduVocExpression::~KEduVocExpression()
 {
-    d->m_lesson->removeEntry(this);
+    if (d->m_lesson) {
+        d->m_lesson->removeEntry(this);
+    }
     delete d;
 }