Enable -Wint-conversion warning (#1266)

* fixing some warnings

* more pointer fixing

* Use `-Wno-int-conversion` on audio files

* more progress

* fix

* more pointer fixes

* kinda progress

* Fix remaining casts

* Format

* fix merge

* fix warnings

* fix parameter

* use SEGMENT_ROM_START_OFFSET a bit more

* format

* fix audio warnings

* some more fixes

* fix en_go

* review

* review

* whoops, missing cast

* review

* review

* ->data

* format

* review

* fix

* asPtr

* fix

* Update src/code/sched.c

Co-authored-by: Derek Hensley <hensley.derek58@gmail.com>

* review

* fix in EnDnh

* improve format

* engo

* format

* fix

* format

* Update include/z64.h

Co-authored-by: Derek Hensley <hensley.derek58@gmail.com>

* TexturePtr

* fix warnings

* fix warnings

* format

* fix

* review

---------

Co-authored-by: Derek Hensley <hensley.derek58@gmail.com>

src/code/z_lib.c

@@ -715,11 +715,11 @@ void* Lib_SegmentedToVirtualNull(void* ptr) {
  * the NULL virtual address being 0x00000000 and not 0x80000000. Used by transition overlays, which store their
  * addresses in 24-bit fields.
  */
-void* Lib_VirtualToPhysical(void* ptr) {
+uintptr_t Lib_VirtualToPhysical(void* ptr) {
     if (ptr == NULL) {
-        return NULL;
+        return 0;
     } else {
-        return (void*)OS_K0_TO_PHYSICAL(ptr);
+        return OS_K0_TO_PHYSICAL(ptr);
     }
 }
 
@@ -728,8 +728,8 @@ void* Lib_VirtualToPhysical(void* ptr) {
  * the NULL virtual address being 0x00000000 and not 0x80000000. Used by transition overlays, which store their
  * addresses in 24-bit fields.
  */
-void* Lib_PhysicalToVirtual(void* ptr) {
-    if (ptr == NULL) {
+void* Lib_PhysicalToVirtual(uintptr_t ptr) {
+    if (ptr == 0) {
         return NULL;
     } else {
         return OS_PHYSICAL_TO_K0(ptr);