Fix a crash when loading .pvr compressed texture.

--HG--
branch : minor

src/modules/image/magpie/EXRHandler.cpp

@@ -101,7 +101,7 @@ static T *loadEXRChannels(int width, int height, T *rgba[4], T one)
 
 FormatHandler::DecodedImage EXRHandler::decode(love::filesystem::FileData *data)
 {
-	const char *err;
+	const char *err = "unknown error";
 	auto mem = (const unsigned char *) data->getData();
 	size_t memsize = data->getSize();
 	DecodedImage img;

src/modules/image/magpie/PVRHandler.cpp

@@ -513,7 +513,6 @@ StrongRef<CompressedImageData::Memory> PVRHandler::parse(filesystem::FileData *f
 		throw love::Exception("Could not parse PVR file: unsupported image format.");
 
 	size_t totalsize = 0;
-	uint8 *data = nullptr;
 
 	// Ignore faces and surfaces except the first ones (for now.)
 	for (int i = 0; i < (int) header3.numMipmaps; i++)
@@ -541,7 +540,7 @@ StrongRef<CompressedImageData::Memory> PVRHandler::parse(filesystem::FileData *f
 		int width = std::max((int) header3.width >> i, 1);
 		int height = std::max((int) header3.height >> i, 1);
 
-		memcpy(data + curoffset, filebytes + curoffset, mipsize);
+		memcpy(memory->data + curoffset, filebytes + curoffset, mipsize);
 
 		auto slice = new CompressedImageData::Slice(cformat, width, height, memory, curoffset, mipsize);
 		images.push_back(slice);