Merge branch 'libxml2-2.12' into 'master'

sanei_usb: Fix build with libxml2 2.12

See merge request sane-project/backends!814

sanei/sanei_usb.c

@@ -65,6 +65,7 @@
 #include <time.h>
 
 #if WITH_USB_RECORD_REPLAY
+#include <libxml/parser.h>
 #include <libxml/tree.h>
 #endif