Memory: add hex dump for unfreed blocks in u_report_unfreed_blocks

lib/mem.c

@@ -226,6 +226,8 @@ void u_report_unfreed_blocks(void) {
         void* user_ptr = prefix_start + BOUNDARY_CHECK_SIZE + 8;
         u_check(user_ptr, "unfreed_check", "u_report_unfreed_blocks");
         printf(" - Allocated at: %s, size: %u bytes\n", alloc_loc, size);
+        printf("   Full memory dump at %p:\n", user_ptr);
+        hex_dump(user_ptr, size);
         curr = *(void**)((uint8_t*)curr + NEXT_OFFSET);
     }
 }