* Add missing file SDL_hints_c.h

src/SDL_hints_c.h

+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
+ 
+ This software is provided 'as-is', without any express or implied
+ warranty.  In no event will the authors be held liable for any damages
+ arising from the use of this software.
+ 
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+ 
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+ */
+
+#ifndef _SDL_hints_c_h
+#define _SDL_hints_c_h
+
+/**
+ *  \brief  A callback function that is optionally called when a hint changes
+ */
+typedef void (*SDL_HintChangedCb)(const char *name, const char *oldValue, const char *newValue);
+
+extern SDL_bool SDL_RegisterHintChangedCb(const char *name, SDL_HintChangedCb hintCb);
+
+#endif /* _SDL_hints_c_h */
+
+/* vi: set ts=4 sw=4 expandtab: */
\ No newline at end of file