writerfilter: fail on mistyped namespace URL's

And also fix one typo detected by this new check.

Change-Id: Iaa7a4bb0b6dc3f81e5dd0b352584029cfed4ffbb

oox/source/token/namespaces.txt

@@ -74,7 +74,7 @@ wps                     http://schemas.microsoft.com/office/word/2010/wordproces
 wpg                     http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
 wp14                    http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
 w14                     http://schemas.microsoft.com/office/word/2010/wordml
-a14                     http://schemas.microsoft.com/office/drawingml/2010/main
+a14                     http://schemas.microsoft.com/office/drawing/2010/main
 
 # extlst namespaces
 

writerfilter/source/ooxml/modelpreprocess.py

@@ -70,10 +70,7 @@ def check(model):
 def preprocess(model):
     for i in model.getElementsByTagName("namespace-alias"):
         name = i.getAttribute("name")
-        if name in list(ooxUrlIds.keys()):
-            i.setAttribute("id", ooxUrlIds[name])
-        else:
-            i.setAttribute("id", ooxAliasIds[i.getAttribute("alias")])
+        i.setAttribute("id", ooxUrlIds[name])
         namespaceAliases[name] = i.getAttribute("alias")
 
     for i in model.getElementsByTagName("namespace"):