hpeldsp: Increase put_no_rnd_pixels_tab[][] size

CC: libav-stable@libav.org
Bug-Id: CID 991852

libavcodec/hpeldsp.h

@@ -69,7 +69,7 @@ typedef struct HpelDSPContext {
 
     /**
      * Halfpel motion compensation with no rounding (a+b)>>1.
-     * this is an array[2][4] of motion compensation functions for 2
+     * this is an array[4][4] of motion compensation functions for 2
      * horizontal blocksizes (8,16) and the 4 halfpel positions<br>
      * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]
      * @param block destination where the result is stored
@@ -77,7 +77,7 @@ typedef struct HpelDSPContext {
      * @param line_size number of bytes in a horizontal line of block
      * @param h height
      */
-    op_pixels_func put_no_rnd_pixels_tab[2][4];
+    op_pixels_func put_no_rnd_pixels_tab[4][4];
 
     /**
      * Halfpel motion compensation with no rounding (a+b)>>1.