libdraw: die if display does

src/libdraw/drawclient.c

diff --git a/src/libdraw/drawclient.c b/src/libdraw/drawclient.c
index 93c5623..5e9c950 100644
--- a/src/libdraw/drawclient.c
+++ b/src/libdraw/drawclient.c
@@ -9,7 +9,7 @@
 #include <drawfcall.h>
 #include <mux.h>
 
-int chattydrawclient;
+int chattydrawclient = 0;
 
 static int	drawgettag(Mux *mux, void *vmsg);
 static void*	drawrecv(Mux *mux);
@@ -43,7 +43,7 @@
 		 * Pass it along only so that the various
 		 * devdraws in psu -a can be distinguished.
 		 */
-		execl("devdraw", "devdraw", argv0, nil);
+		execl("devdraw", argv0, argv0, nil);
 		sysfatal("exec devdraw: %r");
 	}
 	close(p[1]);

src/libdraw/mouse.c

diff --git a/src/libdraw/mouse.c b/src/libdraw/mouse.c
index 5c6d097..ad1a069 100644
--- a/src/libdraw/mouse.c
+++ b/src/libdraw/mouse.c
@@ -53,7 +53,7 @@
 	resized = 0;
 	for(;;){
 		if(_displayrdmouse(mc->display, &m, &resized) < 0)
-			threadexits("read error");
+			threadexitsall("mouse read error");
 		if(resized)
 			send(mc->resizec, &one);
 		send(mc->c, &m);