Remove typo from CMakeLists

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@622 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/CMakeLists.txt

@@ -550,7 +550,7 @@ ADD_LIBRARY( assimp SHARED
 	ObjTools.h
 	OgreImporter.h
 	OgreImporter.cpp
-	OgreImporterMaterial.cpp"
+	OgreImporterMaterial.cpp
 	OptimizeGraph.cpp
 	OptimizeGraph.h
 	OptimizeMeshes.cpp