Merge branch 'master' into physics3d-material

include/Nazara/Core/MemoryHelper.hpp

@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Jérôme Leclercq
+// Copyright (C) 2017 Jérôme Leclercq
 // This file is part of the "Nazara Engine - Core module"
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
@@ -11,13 +11,15 @@
 
 #include <malloc.h>
 
+// with MSVC, using alloca with a size of zero returns a valid pointer
 #define NAZARA_ALLOCA(size) _alloca(size)
 #define NAZARA_ALLOCA_SUPPORT
 
 #elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
 #include <alloca.h>
 
-#define NAZARA_ALLOCA(size) alloca(size)
+// with Clang/GCC, using alloca with a size of zero does nothing good
+#define NAZARA_ALLOCA(size) alloca(((size) > 0) ? (size) : 1)
 #define NAZARA_ALLOCA_SUPPORT
 
 #endif

include/Nazara/Core/MemoryHelper.inl

@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Jérôme Leclercq
+// Copyright (C) 2017 Jérôme Leclercq
 // This file is part of the "Nazara Engine - Core module"
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
@@ -70,11 +70,14 @@ namespace Nz
 	* \brief Calls the object destructor explicitly
 	*
 	* \param ptr Pointer to a previously constructed pointer on raw memory
+	*
+	* \remark This does not deallocate memory, and is a no-op on a null pointer
 	*/
 	template<typename T>
 	void PlacementDestroy(T* ptr)
 	{
-		ptr->~T();
+		if (ptr)
+			ptr->~T();
 	}
 
 	/*!

include/Nazara/Math/Algorithm.inl

@@ -81,7 +81,7 @@ namespace Nz
 		{
 			static_assert(sizeof(T) % sizeof(UInt32) == 0, "Assertion failed");
 
-			// The algorithm for logarithm in base 2 only works with numbers greather than 32 bits
+			// The algorithm for logarithm in base 2 only works with numbers greater than 32 bits
 			// This code subdivides the biggest number into 32 bits ones
 			for (int i = sizeof(T)-sizeof(UInt32); i >= 0; i -= sizeof(UInt32))
 			{