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games/dmid: no longer threaded

--- a/sys/src/games/dmid.c

+++ b/sys/src/games/dmid.c

@@ -1,7 +1,6 @@

 #include <u.h>

 #include <libc.h>

 #include <bio.h>

-#include <thread.h>

 typedef struct Inst Inst;

 typedef struct Opl Opl;

@@ -436,7 +435,7 @@

 		}

 		m = get8(x);

 		switch(n){

-		case 0x2f: dprint("it\'s over.\n"); return -1;

+		case 0x2f: dprint(" -- so long!\n"); return -1;

 		case 0x51: tempo = get16(x) << 8; tempo |= get8(x); break;

 		default: skip(x, m);

 		}

@@ -527,7 +526,7 @@

 }

 void

-threadmain(int argc, char **argv)

+main(int argc, char **argv)

 {

 	int n, end, debug;

 	char *i;

@@ -566,7 +565,7 @@

 		for(;;){

 			getvar(nil);

 			if(ev(nil, 0) < 0)

-				threadexits(nil);

+				exits(nil);

 		}

 	}

 	for(end=0; !end;){