shithub: riscv

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fplot: fix zoom egetrect check (thanks qu7uux)

--- a/sys/src/cmd/fplot.c

+++ b/sys/src/cmd/fplot.c

@@ -432,7 +432,7 @@

 	m.buttons = 7;

 	r = egetrect(1, &m);

-	if(r.min.x == 0 && r.min.y == 0 && r.max.x == 0 && r.max.y == 0)

+	if(Dx(r) < 1 || Dy(r) < 1)

 		return;

 	xmin_ = convx(&screen->r, r.min.x);

 	xmax_ = convx(&screen->r, r.max.x);