Fix a memory leak in TextBatch:add when the internal buffer is resized

src/modules/graphics/TextBatch.cpp

@@ -65,7 +65,8 @@ void TextBatch::uploadVertices(const std::vector<Font::GlyphVertex> &vertices, s
 
 		Buffer::Settings settings(BUFFERUSAGEFLAG_VERTEX, BUFFERDATAUSAGE_DYNAMIC);
 		auto decl = Buffer::getCommonFormatDeclaration(Font::vertexFormat);
-		Buffer *newbuffer = gfx->newBuffer(settings, decl, nullptr, newsize, 0);
+
+		StrongRef<Buffer> newbuffer(gfx->newBuffer(settings, decl, nullptr, newsize, 0), Acquire::NORETAIN);
 
 		void *newdata = nullptr;
 		if (vertexData != nullptr)