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-rw-r--r--src/PJ_nell.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/PJ_nell.c b/src/PJ_nell.c
index dd41b468..77983de8 100644
--- a/src/PJ_nell.c
+++ b/src/PJ_nell.c
@@ -6,6 +6,7 @@ PROJ_HEAD(nell, "Nell") "\n\tPCyl., Sph.";
FORWARD(s_forward); /* spheroid */
double k, V;
int i;
+ (void) P;
k = 2. * sin(lp.phi);
V = lp.phi * lp.phi;