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-rw-r--r--src/PJ_airy.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/PJ_airy.cpp b/src/PJ_airy.cpp
index fa159bae..0eb5efd7 100644
--- a/src/PJ_airy.cpp
+++ b/src/PJ_airy.cpp
@@ -116,7 +116,7 @@ PJ *PROJECTION(airy) {
double beta;
struct pj_opaque *Q = static_cast<struct pj_opaque*>(pj_calloc (1, sizeof (struct pj_opaque)));
- if (0==Q)
+ if (nullptr==Q)
return pj_default_destructor (P, ENOMEM);
P->opaque = Q;