shithub: ifilter

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fix factors applied to the wrong color components in grayscale filter

--- a/ifilter.c

+++ b/ifilter.c

@@ -16,7 +16,7 @@

 void

 grayscale(uchar p[3])

 {

-	uchar v = 0.2126*p[0] + 0.7152*p[1] + 0.0722*p[2];

+	uchar v = 0.2126*p[2] + 0.7152*p[1] + 0.0722*p[0];

 	p[0] = p[1] = p[2] = v;

 }