Fixed crash in locale filter and drop rule, #715116

When the dropped node has no preceding sibling, itstool crashes
because it tries to unlink prev node if it's blank.

1 files changed, 2 insertions, 2 deletions

diff --git a/itstool.in b/itstool.in
index 150b395..a04ab2b 100755
--- a/itstool.in
+++ b/itstool.in
@@ -859,7 +859,7 @@ class Document (object):
             prev = node.prev
             node.unlinkNode()
             node.freeNode()
-            if prev.isBlankNode():
+            if prev is not None and prev.isBlankNode():
                 prev.unlinkNode()
                 prev.freeNode()
             return
@@ -914,7 +914,7 @@ class Document (object):
             prev = node.prev
             node.unlinkNode()
             node.freeNode()
-            if prev.isBlankNode():
+            if prev is not None and prev.isBlankNode():
                 prev.unlinkNode()
                 prev.freeNode()
             return