BMessage: Added missing [Get|Set]Pointer()

* SetPointer() was declared, but not defined.

headers/os/app/Message.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2005-2015 Haiku, Inc. All rights reserved.
+ * Copyright 2005-2017 Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -461,6 +461,10 @@ public:
 									rgb_color defaultValue) const;
 			rgb_color			GetColor(const char* name, int32 index,
 									rgb_color defaultValue) const;
+			const void*			GetPointer(const char* name, int32 index,
+									const void* defaultValue = NULL) const;
+			const void*			GetPointer(const char* name,
+									const void* defaultValue = NULL) const;
 			const char*			GetString(const char* name,
 									const char* defaultValue = NULL) const;
 			const char*			GetString(const char* name, int32 index,

src/kits/app/Message.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2005-2015 Haiku, Inc. All rights reserved.
+ * Copyright 2005-2017 Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -2592,6 +2592,32 @@ DEFINE_SET_GET_FUNCTIONS(rgb_color, Color, B_RGB_32_BIT_TYPE);
 #undef DEFINE_SET_GET_FUNCTION
 
 
+const void*
+BMessage::GetPointer(const char* name, const void* defaultValue) const
+{
+	return GetPointer(name, 0, defaultValue);
+}
+
+
+const void*
+BMessage::GetPointer(const char* name, int32 index,
+	const void* defaultValue) const
+{
+	void* value;
+	if (FindPointer(name, index, &value) == B_OK)
+		return value;
+
+	return defaultValue;
+}
+
+
+status_t
+BMessage::SetPointer(const char* name, const void* value)
+{
+	return SetData(name, B_POINTER_TYPE, &value, sizeof(void*));
+}
+
+
 #define DEFINE_SET_GET_BY_REFERENCE_FUNCTIONS(type, typeName, typeCode)		\
 type																		\
 BMessage::Get##typeName(const char* name, const type& defaultValue) const	\