Adds TODO comments to remove implementation defined pointer manipulation.

src/code/z_scene.c

@@ -145,7 +145,6 @@ void* func_8012F73C(SceneContext* sceneCtxt, s32 iParm2, s16 id) {
     vromSize = fileTableEntry->vromEnd - fileTableEntry->vromStart;
     // TODO: UB to cast void to u32
     addr = ((u32)sceneCtxt->objects[iParm2].vramAddr) + vromSize;
-    // TODO: This is ALIGN16 macro from OOT. Seems to be aligning an address to DMA
     addr = ALIGN16(addr);
     // UB to cast u32 to pointer
     return (void*)addr;

src/libultra/os/virtualtophysical.c

@@ -2,6 +2,7 @@
 #include <osint.h>
 
 u32 osVirtualToPhysical(void* virtualAddress) {
+    // UB: u32 casts here should be uintptr_t casts.
     if (((u32)virtualAddress >= 0x80000000) && ((u32)virtualAddress < 0xA0000000)) {
         return (u32)virtualAddress & 0x1FFFFFFF;
     } else if (((u32)virtualAddress >= 0xA0000000) && ((u32)virtualAddress < 0xC0000000)) {