CGA and Tandy 1000 HX/SX: Properly implement the light pen strobe. Jungle Hunt's palette changed area still moves, that's a PIT bug, I'm going to look into that again in 5.0 when I go back to porting 808x etc. from MartyPC.

src/include/86box/vid_cga.h

@@ -31,6 +31,8 @@ typedef struct cga_t {
     uint8_t cgamode;
     uint8_t cgacol;
 
+    uint8_t lp_strobe;
+
     int      fontbase;
     int      linepos;
     int      displine;