BUG: superbuild: don't use geos dll on msvc

SuperBuild/CMake/External_geos.cmake

@@ -32,7 +32,7 @@ else()
   
   set(_SB_${proj}_INCLUDE_DIR ${SB_INSTALL_PREFIX}/include)
   if(WIN32)
-    set(_SB_${proj}_LIBRARY ${SB_INSTALL_PREFIX}/bin/geos.dll)
+    set(_SB_${proj}_LIBRARY ${SB_INSTALL_PREFIX}/lib/geos.lib)
   elseif(UNIX)
     set(_SB_${proj}_LIBRARY ${SB_INSTALL_PREFIX}/lib/libgeos${CMAKE_SHARED_LIBRARY_SUFFIX})
   endif()