Enable Tablet support with both Tilt and Pressure.

diff --git a/include/config.h.in b/include/config.h.in
index 4685930..c4318c6 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -1195,6 +1195,11 @@
 #undef HAVE_X11_EXTENSIONS_XF86VMODE_H
 
 /* 
+   Define to 1 if you have the <X11/extensions/XInput.h>
+   header file. */
+#undef HAVE_X11_EXTENSIONS_XINPUT_H
+
+/* 
    Define to 1 if you have the <X11/extensions/Xrandr.h>
    header file. */
 #undef HAVE_X11_EXTENSIONS_XRANDR_H
@@ -1379,6 +1384,11 @@
 #undef SONAME_LIBXEXT
 
 /* 
+   Define to the soname of the libXi library.
+   */
+#undef SONAME_LIBXI
+
+/* 
    Define to the soname of the libXrender library.
    */
 #undef SONAME_LIBXRENDER