Fix headless windows build

Author: dcwhite

src/Main/CMakeLists.txt

@@ -275,19 +275,22 @@ ELSE()
         WORKING_DIRECTORY ${SCIRun_BINARY_DIR})
     ENDIF()
 
+	IF(NOT BUILD_HEADLESS)
     # Note: installer is created from Release build only!
     GET_FILENAME_COMPONENT(QTCORENAME ${QT_QTCORE_LIBRARY_RELEASE} NAME_WE)
     GET_FILENAME_COMPONENT(QTGUINAME ${QT_QTGUI_LIBRARY_RELEASE} NAME_WE)
     GET_FILENAME_COMPONENT(QTOPENGLNAME ${QT_QTOPENGL_LIBRARY_RELEASE} NAME_WE)
     GET_FILENAME_COMPONENT(QTNETWORKNAME ${QT_QTNETWORK_LIBRARY_RELEASE} NAME_WE)
-
+ENDIF()
     INSTALL(TARGETS ${APPLICATION_NAME} RUNTIME DESTINATION bin)
+	IF(NOT BUILD_HEADLESS)
     INSTALL(PROGRAMS
       ${QT_BINARY_DIR}/${QTCORENAME}.dll
       ${QT_BINARY_DIR}/${QTGUINAME}.dll
       ${QT_BINARY_DIR}/${QTOPENGLNAME}.dll
       ${QT_BINARY_DIR}/${QTNETWORKNAME}.dll
       DESTINATION bin)
+	  ENDIF()
     IF(BUILD_WITH_PYTHON)
       INSTALL(PROGRAMS
         ${SCI_PYTHON_DLL_PATH}