screen: move the SCR_DrawCrosshair declaration to the header.

src/client/cl_view.c

@@ -26,8 +26,6 @@
 
 #include "header/client.h"
 
-void SCR_DrawCrosshair(void);
-
 /* development tools for weapons */
 int gun_frame;
 struct model_s *gun_model;

src/client/header/screen.h

@@ -65,6 +65,8 @@ void SCR_RunCinematic(void);
 void SCR_StopCinematic(void);
 void SCR_FinishCinematic(void);
 
+void SCR_DrawCrosshair(void);
+
 float SCR_GetHUDScale(void);
 
 #endif