shithub: pplay

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don't treat deleting all prompt text as an error

--- a/pplay.c

+++ b/pplay.c

@@ -198,7 +198,7 @@

 			case '_': setzoom(-1, 1); break;

 			case '+': setzoom(1, 1); break;

 			default:

-				if((p = prompt(r)) == nil)

+				if((p = prompt(r)) == nil || strlen(p) == 0)

 					break;

 				if(cmd(p) < 0)

 					fprint(2, "cmd \"%s\" failed: %r\n", p);