build error on Alpha patch by (Sam Hocevar <sam at zoy dot org>)

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@1996 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/alpha/dsputil_alpha.c

@@ -20,6 +20,7 @@
 #include "asm.h"
 #include "../dsputil.h"
 
+extern void simple_idct_axp(DCTELEM *block);
 extern void simple_idct_put_axp(uint8_t *dest, int line_size, DCTELEM *block);
 extern void simple_idct_add_axp(uint8_t *dest, int line_size, DCTELEM *block);
 
@@ -363,5 +364,5 @@ void dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx)
     
     c->idct_put = simple_idct_put_axp;
     c->idct_add = simple_idct_add_axp;
-    c->idct_idct = simple_idct_axp;
+    c->idct = simple_idct_axp;
 }