avcodec/jpeg2000: Disable special case for JPEG2000_QSTY_SI

The code gave apparently completely wrong values

Fixes Ticket2872
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/jpeg2000.c

@@ -293,11 +293,11 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
                 break;
             case JPEG2000_QSTY_SI:
                 /*TODO: Compute formula to implement. */
-                numbps = cbps +
-                         lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
-                band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
-                                       2 + numbps - qntsty->expn[gbandno]);
-                break;
+//                 numbps = cbps +
+//                          lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
+//                 band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
+//                                        2 + numbps - qntsty->expn[gbandno]);
+//                 break;
             case JPEG2000_QSTY_SE:
                 /* Exponent quantization step.
                  * Formula: