Fix vertical resolution of subtitles.

Patch by Björn Axelsson gecko A acc D umu D se

Originally committed as revision 16963 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffplay.c

@@ -533,7 +533,7 @@ static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw,
             a1 = a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 
-            YUVA_IN(y, u, v, a, p, pal);
+            YUVA_IN(y, u, v, a, p + BPP, pal);
             u1 += u;
             v1 += v;
             a1 += a;
@@ -547,7 +547,7 @@ static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw,
             a1 += a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 
-            YUVA_IN(y, u, v, a, p, pal);
+            YUVA_IN(y, u, v, a, p + BPP, pal);
             u1 += u;
             v1 += v;
             a1 += a;