added missing .cc-file to CMakeLists

AMDiS/CMakeLists.txt

@@ -162,6 +162,7 @@ SET(AMDIS_SRC ${SOURCE_DIR}/AdaptBase.cc
 	      ${SOURCE_DIR}/io/ValueReader.cc
 	      ${SOURCE_DIR}/io/ValueWriter.cc
 	      ${SOURCE_DIR}/io/VtkWriter.cc
+	      ${SOURCE_DIR}/io/VtkVectorWriter.cc
 	      ${SOURCE_DIR}/nonlin/ProblemNonLin.cc
 	      ${SOURCE_DIR}/parallel/InteriorBoundary.cc
 	      ${SOURCE_DIR}/time/RosenbrockAdaptInstationary.cc