big warning hunt commit

lot of casts, added prototypes, missing includes and some true errors

source/blender/include/BIF_editview.h

@@ -41,7 +41,7 @@ void	borderselect(void);
 void	circle_select(void);
 void	deselectall(void);
 void selectall_type(short obtype);
-void selectall_layer(int layernum);
+void selectall_layer(unsigned int layernum);
 void	draw_sel_circle(short *mval, short *mvalo, float rad, float rado, int selecting);
 void	fly(void);
 int		gesture(void);