atomics: use "const" pointers for the load-only atomics on MSVC

Signed-off-by: Steven Noonan <steven@uplinklabs.net>

miniaudio.h

@@ -8720,28 +8720,28 @@ typedef unsigned char           c89atomic_bool;
     #define c89atomic_compiler_fence()      c89atomic_thread_fence(c89atomic_memory_order_seq_cst)
     #define c89atomic_signal_fence(order)   c89atomic_thread_fence(order)
     #if defined(C89ATOMIC_HAS_8)
-        static C89ATOMIC_INLINE c89atomic_uint8 c89atomic_load_explicit_8(volatile c89atomic_uint8* ptr, c89atomic_memory_order order)
+        static C89ATOMIC_INLINE c89atomic_uint8 c89atomic_load_explicit_8(volatile const c89atomic_uint8* ptr, c89atomic_memory_order order)
         {
             (void)order;
             return c89atomic_compare_and_swap_8(ptr, 0, 0);
         }
     #endif
     #if defined(C89ATOMIC_HAS_16)
-        static C89ATOMIC_INLINE c89atomic_uint16 c89atomic_load_explicit_16(volatile c89atomic_uint16* ptr, c89atomic_memory_order order)
+        static C89ATOMIC_INLINE c89atomic_uint16 c89atomic_load_explicit_16(volatile const c89atomic_uint16* ptr, c89atomic_memory_order order)
         {
             (void)order;
             return c89atomic_compare_and_swap_16(ptr, 0, 0);
         }
     #endif
     #if defined(C89ATOMIC_HAS_32)
-        static C89ATOMIC_INLINE c89atomic_uint32 c89atomic_load_explicit_32(volatile c89atomic_uint32* ptr, c89atomic_memory_order order)
+        static C89ATOMIC_INLINE c89atomic_uint32 c89atomic_load_explicit_32(volatile const c89atomic_uint32* ptr, c89atomic_memory_order order)
         {
             (void)order;
             return c89atomic_compare_and_swap_32(ptr, 0, 0);
         }
     #endif
     #if defined(C89ATOMIC_HAS_64)
-        static C89ATOMIC_INLINE c89atomic_uint64 c89atomic_load_explicit_64(volatile c89atomic_uint64* ptr, c89atomic_memory_order order)
+        static C89ATOMIC_INLINE c89atomic_uint64 c89atomic_load_explicit_64(volatile const c89atomic_uint64* ptr, c89atomic_memory_order order)
         {
             (void)order;
             return c89atomic_compare_and_swap_64(ptr, 0, 0);