shithub: riscv

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devdraw: coding style (from drawterm)

--- a/sys/src/9/port/devdraw.c

+++ b/sys/src/9/port/devdraw.c

@@ -626,7 +626,7 @@

 		dscreen = this->next;

 		goto Found;

 	}

-	while(next = ds->next){	/* assign = */

+	while((next = ds->next) != nil){

 		if(next == this){

 			ds->next = this->next;

 			goto Found;

@@ -699,7 +699,7 @@

 		free(this);

 		return;

 	}

-	while(next = cs->next){	/* assign = */

+	while((next = cs->next) != nil){

 		if(next == this){

 			cs->next = this->next;

 			drawfreedscreen(this->dscreen);

@@ -723,7 +723,7 @@

 		drawfreedimage(d);

 		return;

 	}

-	while(next = d->next){	/* assign = */

+	while((next = d->next) != nil){

 		if(next->id == id){

 			d->next = next->next;

 			drawfreedimage(next);

@@ -1082,7 +1082,7 @@

 	if(QID(c->qid) == Qctl)

 		cl->busy = 0;

 	if((c->flag&COPEN) && (decref(&cl->r)==0)){

-		while(r = cl->refresh){	/* assign = */

+		while((r = cl->refresh) != nil){

 			cl->refresh = r->next;

 			free(r);

 		}