Fix MSVC errors and warnings

src/core/mem/arena/mem_arena.c

@@ -1,6 +1,7 @@
 #include "mem_arena.h"
 #include "aliases.h"
 #include "mem_utils.h"
+#include "misc_utils.h"
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>

src/core/mem/libc/mem_libc_allocator.c

@@ -24,12 +24,15 @@ Allocator wapp_mem_libc_allocator(void) {
 }
 
 internal inline void *mem_libc_alloc(u64 size, void *alloc_obj) {
+  (void)alloc_obj; // Silence unused warnings
   return calloc(1, size);
 }
 
 #if 0
 internal inline void *mem_libc_alloc_aligned(u64 size, u64 alignment,
                                              void *alloc_obj) {
+  (void)alloc_obj; // Silence unused warnings
+
   void *output = aligned_alloc(alignment, size);
   if (output) {
     memset(output, 0, size);
@@ -40,10 +43,16 @@ internal inline void *mem_libc_alloc_aligned(u64 size, u64 alignment,
 #endif
 
 internal inline void *mem_libc_realloc(void *ptr, u64 old_size, u64 new_size, void *alloc_obj) {
+  // Silence unused warnings
+  (void)alloc_obj;
+  (void)new_size;
+
   return realloc(ptr, old_size);
 }
 
 internal inline void mem_libc_free(void **ptr, void *alloc_obj) {
+  (void)alloc_obj; // Silence unused warnings
+
   if (!ptr || !(*ptr)) {
     return;
   }