demos: s/X11_INCLUDE_DIRS/X11_INCLUDE_DIR/ typo

Signed-off-by: Robert Bragg <robert.bragg@intel.com>

diff --git a/demos/CMakeLists.txt b/demos/CMakeLists.txt
index c720e49..b65daaa 100644 (file)
--- a/demos/CMakeLists.txt
+++ b/demos/CMakeLists.txt
@@ -89,7 +89,7 @@ if(NOT WIN32)
         link_libraries(${XCB_LIBRARIES})
     endif()
     if(BUILD_WSI_XLIB_SUPPORT)
-        include_directories(${X11_INCLUDE_DIRS})
+        include_directories(${X11_INCLUDE_DIR})
         link_libraries(${X11_LIBRARIES})
     endif()
     if(BUILD_WSI_WAYLAND_SUPPORT)