Bug 1188010 - Use MOZ_RELEASE_ASSERT. r=dglastonbury

Use MOZ_RELEASE_ASSERT when failure means overflows.
From b9fe1e06f63a785f309e1ce7e5053cb57e21e634 Mon Sep 17 00:00:00 2001
---
 dom/canvas/WebGLTexture.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--HG--
extra : rebase_source : 81b89bbd224d6f77f62c5fa5f2ac8b14a8373128

dom/canvas/WebGLTexture.cpp

@@ -648,8 +648,7 @@ WebGLTexture::EnsureInitializedImageData(TexImageTarget imageTarget,
                         imageInfo.mDepth,
                         bytespertexel,
                         mContext->mPixelStoreUnpackAlignment);
-    MOZ_ASSERT(checked_byteLength.isValid()); // Should have been checked
-                                              // earlier.
+    MOZ_RELEASE_ASSERT(checked_byteLength.isValid()); // Should have been checked earlier.
 
     size_t byteCount = checked_byteLength.value();