Fix examples not building with gestures system disabled (#4020)

Build no longer fails with -DSUPPORT_GESTURES_SYSTEM=OFF and -DBUILD_EXAMPLES=ON

examples/CMakeLists.txt

@@ -113,6 +113,13 @@ elseif ("${PLATFORM}" STREQUAL "DRM")
     list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/rlgl_standalone.c)
     list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/raylib_opengl_interop.c)
 
+elseif (NOT SUPPORT_GESTURES_SYSTEM)
+    # Items requiring gestures system
+    list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/textures/textures_mouse_painting.c)
+    list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_basic_screen_manager.c)
+    list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_input_gestures_web.c)
+    list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_input_gestures.c)
+
 endif ()
 
 # The rlgl_standalone example only targets desktop, without shared libraries.