mapnik_projection.cpp.patch

diff --git a/src/projection.cpp b/src/projection.cpp
index ceb8265..7f0d499 100644
--- a/src/projection.cpp
+++ b/src/projection.cpp
@@ -99,6 +99,7 @@ void projection::init_proj() const
     if (!proj_)
     {
         proj_ctx_ = proj_context_create();
+        proj_log_level(proj_ctx_, PJ_LOG_ERROR);
         proj_ = proj_create(proj_ctx_, params_.c_str());
         if (!proj_ || !proj_ctx_)
         {