config: optional extension check for inputproto not required

The check should be in PKG_CHECK_MODULES permanently.

The XORG_DRIVER_CHECK_EXT will add inputproto to PKG_CHECK_MODULES
only if the extension is available. By definition, this extension
is always available and the evdev driver cannot function without it.

This is evidenced by the absence of XINPUT conditional code.

Signed-off-by: Gaetan Nadon <memsize@videotron.ca>

configure.ac

@@ -53,12 +53,9 @@ AC_ARG_WITH(xorg-module-dir,
 inputdir=${moduledir}/input
 AC_SUBST(inputdir)
 
-# Checks for extensions
-XORG_DRIVER_CHECK_EXT(XINPUT, inputproto)
-
 # Checks for pkg-config packages. We need to be able to override sdkdir
 # to satisfy silly distcheck requirements.
-PKG_CHECK_MODULES(XORG, xorg-server xproto $REQUIRED_MODULES)
+PKG_CHECK_MODULES(XORG, xorg-server xproto inputproto)
 
 # Checks for libraries.