Fixed texture side iterator being too small (#3025)

src/renderer_vk.cpp

@@ -5968,7 +5968,7 @@ VK_DESTROY
 			bx::memSet(imageInfos, 0, sizeof(ImageInfo) * numSrd);
 			uint32_t alignment = 1; // tightly aligned buffer
 
-			for (uint8_t side = 0; side < numSides; ++side)
+			for (uint16_t side = 0; side < numSides; ++side)
 			{
 				for (uint8_t lod = 0; lod < ti.numMips; ++lod)
 				{