Fix compilation with FreeRdp 1.1 and master v2

The API to use remoteFx encoding has changed between master and stable 1.1
branch. This patch should fix compilation for both.
This new version adds checks for the freerdp/version.h file

configure.ac

@@ -204,6 +204,11 @@ AM_CONDITIONAL([ENABLE_RDP_COMPOSITOR],
 if test x$enable_rdp_compositor = xyes; then
   AC_DEFINE([BUILD_RDP_COMPOSITOR], [1], [Build the RDP compositor])
   PKG_CHECK_MODULES(RDP_COMPOSITOR, [freerdp >= 1.1.0])
+
+  SAVED_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $RDP_COMPOSITOR_CFLAGS"
+  AC_CHECK_HEADERS([freerdp/version.h])
+  CPPFLAGS="$SAVED_CPPFLAGS"
 fi
 
 AC_ARG_WITH(cairo,

src/compositor-rdp.c

@@ -27,6 +27,14 @@
 #include <errno.h>
 #include <linux/input.h>
 
+#if HAVE_FREERDP_VERSION_H
+#include <freerdp/version.h>
+#else
+/* assume it's a early 1.1 version */
+#define FREERDP_VERSION_MAJOR 1
+#define FREERDP_VERSION_MINOR 1
+#endif
+
 #include <freerdp/freerdp.h>
 #include <freerdp/listener.h>
 #include <freerdp/update.h>
@@ -571,7 +579,11 @@ rdp_peer_context_new(freerdp_peer* client, RdpPeerContext* context)
 	context->item.peer = client;
 	context->item.flags = RDP_PEER_OUTPUT_ENABLED;
 
+#if FREERDP_VERSION_MAJOR == 1 && FREERDP_VERSION_MINOR == 1
 	context->rfx_context = rfx_context_new();
+#else
+	context->rfx_context = rfx_context_new(TRUE);
+#endif
 	context->rfx_context->mode = RLGR3;
 	context->rfx_context->width = client->settings->DesktopWidth;
 	context->rfx_context->height = client->settings->DesktopHeight;