[bugfix] FS#13812 - ZXBox always returns a leak file handles error

tapefiles return a leak handle error if it is quit before end of tape is
reached, ensure it always gets closed on exit

Change-Id: I0f6224c7164fd87c209166be9e10d62d6a644a50

apps/plugins/zxbox/spmain.c

@@ -47,6 +47,8 @@
 
 #include "zxbox_keyb.h"
 
+#include "tapefile.h"
+
 int endofsingle IBSS_ATTR;
 
 int sp_nosync IBSS_ATTR = 0;
@@ -519,4 +521,5 @@ void start_spectemu(const void *parameter)
   init_spect_key();
 
   run_singlemode();
+  close_tapefile(); /* Bugfix leak file handles */
 }