don't include LisOption.* if Lis is not used

MathLib/CMakeLists.txt

@@ -23,6 +23,8 @@ SET ( SOURCES ${SOURCES} ${SOURCES_LINALG_PRECOND})
 GET_SOURCE_FILES(SOURCES_LINALG_LEQS LinAlg/SystemOfLinearEquations)
 IF (NOT OGS_USE_LIS)
     LIST(REMOVE_ITEM SOURCES_LINALG_LEQS 
+        LinAlg/SystemOfLinearEquations/LisOption.h
+        LinAlg/SystemOfLinearEquations/LisOption.cpp
         LinAlg/SystemOfLinearEquations/LisLinearSystem.h
         LinAlg/SystemOfLinearEquations/LisLinearSystem.cpp
     )