From dfb65d810c9c96a0b235d8c66eefd43fde199933 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Tue, 9 Apr 2013 16:51:30 -0700
Subject: [PATCH] avoid unused arguments compiler warning

---
 src/png_reader.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/png_reader.cpp b/src/png_reader.cpp
index e1a2466e5..e474bb83e 100644
--- a/src/png_reader.cpp
+++ b/src/png_reader.cpp
@@ -146,7 +146,7 @@ void png_reader::init()
             throw image_reader_exception("failed to create info_ptr");
         }
     }
-    catch (std::exception const& ex)
+    catch (std::exception const& /*ex*/)
     {
         png_destroy_read_struct(&png_ptr,0,0);
         throw;
@@ -204,7 +204,7 @@ void png_reader::read(unsigned x0, unsigned y0,image_data_32& image)
             throw image_reader_exception("failed to create info_ptr");
         }
     }
-    catch (std::exception const& ex)
+    catch (std::exception const& /*ex*/)
     {
         png_destroy_read_struct(&png_ptr,0,0);
         throw;