Updated meshoptimizer.

3rdparty/meshoptimizer/src/allocator.cpp

@@ -1,6 +1,8 @@
 // This file is part of meshoptimizer library; see meshoptimizer.h for version/license details
 #include "meshoptimizer.h"
 
+#include <assert.h>
+
 #ifdef MESHOPTIMIZER_ALLOC_EXPORT
 meshopt_Allocator::Storage& meshopt_Allocator::storage()
 {
@@ -11,6 +13,8 @@ meshopt_Allocator::Storage& meshopt_Allocator::storage()
 
 void meshopt_setAllocator(void* (MESHOPTIMIZER_ALLOC_CALLCONV* allocate)(size_t), void (MESHOPTIMIZER_ALLOC_CALLCONV* deallocate)(void*))
 {
+	assert(allocate && deallocate);
+
 	meshopt_Allocator::Storage& s = meshopt_Allocator::storage();
 	s.allocate = allocate;
 	s.deallocate = deallocate;