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-rw-r--r--src/PJ_robin.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/PJ_robin.c b/src/PJ_robin.c
index 39513e2a..e8572ae4 100644
--- a/src/PJ_robin.c
+++ b/src/PJ_robin.c
@@ -69,6 +69,7 @@ static const struct COEFS Y[] = {
FORWARD(s_forward); /* spheroid */
int i;
double dphi;
+ (void) P;
i = floor((dphi = fabs(lp.phi)) * C1);
if (i >= NODES) i = NODES - 1;