From 03dd6fd8128ef18f2fcf46fa5161219c12feb1f6 Mon Sep 17 00:00:00 2001
From: Craig Disselkoen <craigdissel@gmail.com>
Date: Thu, 10 Oct 2019 13:26:18 -0700
Subject: [PATCH] add an explicit cast

---
 image/decoders/nsPNGDecoder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/image/decoders/nsPNGDecoder.cpp b/image/decoders/nsPNGDecoder.cpp
index bcdbcbc37e..52066fdf96 100644
--- a/image/decoders/nsPNGDecoder.cpp
+++ b/image/decoders/nsPNGDecoder.cpp
@@ -1190,7 +1190,7 @@ nsPNGDecoder::ReadPNGData(const char* aData, size_t aLength)
     d_png_process_data(mPNG, mInfo,
                    reinterpret_cast<unsigned char*>(const_cast<char*>((aData_sandbox))),
                    aLength);
-    freeInPngSandbox(aData_sandbox);
+    freeInPngSandbox(const_cast<void*>(aData_sandbox));
   #endif
   PngBench.Stop();