Revert "Avoid too big changes in isScale"

This reverts commit 226601a8.

This change doesn't seem to be necessary any longer, a proper
fix seems to be included upstream now in
60a27b7f.

libAACenc/src/intensity.cpp

@@ -593,7 +593,6 @@ void FDKaacEnc_IntensityStereoProcessing(
   FIXP_DBL realIsScale[MAX_GROUPED_SFB];
   INTENSITY_PARAMETERS isParams;
   INT isMask[MAX_GROUPED_SFB];
-  INT lastValIs = 0, delta;
 
   FDKmemclear((void*)isBook,sfbCnt*sizeof(INT));
   FDKmemclear((void*)isMask,sfbCnt*sizeof(INT));
@@ -749,14 +748,6 @@ void FDKaacEnc_IntensityStereoProcessing(
         isScale[sfb+sfboffs] = (INT)(((realIsScale[sfb+sfboffs]>>1)+FL2FXCONST_DBL(0.5f/(1<<(REAL_SCALE_SF+LD_DATA_SHIFT+1))))>>(DFRACT_BITS-1-REAL_SCALE_SF-LD_DATA_SHIFT-1));
       }
 
-      delta = isScale[sfb+sfboffs] - lastValIs;
-      if (delta < -CODE_BOOK_SCF_LAV) {
-          isScale[sfb+sfboffs] = lastValIs - CODE_BOOK_SCF_LAV;
-      } else if (delta + CODE_BOOK_SCF_LAV >= (INT)(sizeof(FDKaacEnc_huff_ltabscf)/sizeof(FDKaacEnc_huff_ltabscf[0]))) {
-          isScale[sfb+sfboffs] = lastValIs + sizeof(FDKaacEnc_huff_ltabscf)/sizeof(FDKaacEnc_huff_ltabscf[0]) - CODE_BOOK_SCF_LAV - 1;
-      }
-      lastValIs = isScale[sfb+sfboffs];
-
       sfbEnergyRight[sfb+sfboffs] = FL2FXCONST_DBL(0.0f);
       sfbEnergyLdDataRight[sfb+sfboffs] = FL2FXCONST_DBL(-1.0f);
       sfbThresholdRight[sfb+sfboffs] = FL2FXCONST_DBL(0.0f);