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-rw-r--r--src/blind-spiral-gradient.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/blind-spiral-gradient.c b/src/blind-spiral-gradient.c
index d405412..a248a02 100644
--- a/src/blind-spiral-gradient.c
+++ b/src/blind-spiral-gradient.c
@@ -146,7 +146,7 @@ main(int argc, char *argv[])
stream.width * stream.height > 5)
eprintf("<stdin>: each frame must contain exactly 2, 3, 4, or 5 pixels\n");
- with_params = (stream.width * stream.height) & 2;
+ with_params = (stream.width * stream.height) & 1;
with_vector = stream.width * stream.height > 3;
stream.width = width;