recommit (of patch, as cvslog msg didnt apply cleanly)

libavcodec/ppc compile errors patch by ("Steven M. Schultz" <sms at 2BSD dot COM>)

Originally committed as revision 2354 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/ppc/dsputil_ppc.c

@@ -33,7 +33,7 @@ int mm_flags = 0;
 int mm_support(void)
 {
     int result = 0;
-#if HAVE_ALTIVEC
+#ifdef HAVE_ALTIVEC
     if (has_altivec()) {
         result |= MM_ALTIVEC;
     }
@@ -233,7 +233,7 @@ void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
     break;
   }
   
-#if HAVE_ALTIVEC
+#ifdef HAVE_ALTIVEC
     if (has_altivec()) {
         mm_flags |= MM_ALTIVEC;
         

libavcodec/ppc/mpegvideo_ppc.c

@@ -36,7 +36,7 @@ extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
 
 void MPV_common_init_ppc(MpegEncContext *s)
 {
-#if HAVE_ALTIVEC
+#ifdef HAVE_ALTIVEC
     if (has_altivec())
     {
         if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||