gdi32: Add a missing const.

dlls/gdi32/dibdrv/dibdrv.h

@@ -37,7 +37,7 @@ static inline DC *get_dibdrv_dc( PHYSDEV dev )
 
 typedef struct primitive_funcs
 {
-    void        (* solid_rects)(const dib_info *dib, int num, RECT *rc, DWORD and, DWORD xor);
+    void        (* solid_rects)(const dib_info *dib, int num, const RECT *rc, DWORD and, DWORD xor);
     DWORD (* colorref_to_pixel)(const dib_info *dib, COLORREF color);
 } primitive_funcs;
 

dlls/gdi32/dibdrv/primitives.c

@@ -31,7 +31,7 @@ static inline void do_rop_32(DWORD *ptr, DWORD and, DWORD xor)
     *ptr = (*ptr & and) ^ xor;
 }
 
-static void solid_rects_32(const dib_info *dib, int num, RECT *rc, DWORD and, DWORD xor)
+static void solid_rects_32(const dib_info *dib, int num, const RECT *rc, DWORD and, DWORD xor)
 {
     DWORD *ptr, *start;
     int x, y, i;
@@ -45,7 +45,7 @@ static void solid_rects_32(const dib_info *dib, int num, RECT *rc, DWORD and, DW
     }
 }
 
-static void solid_rects_null(const dib_info *dib, int num, RECT *rc, DWORD and, DWORD xor)
+static void solid_rects_null(const dib_info *dib, int num, const RECT *rc, DWORD and, DWORD xor)
 {
     return;
 }