1 files changed, 4 insertions, 1 deletions

diff --git a/libopie2/opieui/oimageeffect.cpp b/libopie2/opieui/oimageeffect.cpp
index be47eb2..93719bc 100644
--- a/libopie2/opieui/oimageeffect.cpp
+++ b/libopie2/opieui/oimageeffect.cpp
@@ -2006,98 +2006,101 @@ void OImageEffect::normalize(QImage &img)
                 gray_value = intensityValue(data[x]);
                 histogram[gray_value]++;
             }
         }
     }
     else{ // PsudeoClass
         unsigned char *data;
         unsigned int *cTable = img.colorTable();
         for(y=0; y < img.height(); ++y){
             data = (unsigned char *)img.scanLine(y);
             for(x=0; x < img.width(); ++x){
                 gray_value = intensityValue(*(cTable+data[x]));
                 histogram[gray_value]++;
             }
         }
     }
 
     // find histogram boundaries by locating the 1 percent levels
     threshold_intensity = (img.width()*img.height())/100;
     intense = 0;
     for(low=0; low < MaxRGB; ++low){
         intense+=histogram[low];
         if(intense > threshold_intensity)
             break;
     }
     intense=0;
     for(high=MaxRGB; high != 0; --high){
         intense+=histogram[high];
         if(intense > threshold_intensity)
             break;
     }
 
     if (low == high){
         // Unreasonable contrast;  use zero threshold to determine boundaries.
         threshold_intensity=0;
         intense=0;
         for(low=0; low < MaxRGB; ++low){
             intense+=histogram[low];
             if(intense > threshold_intensity)
                 break;
         }
         intense=0;
         for(high=MaxRGB; high != 0; --high)
         {
             intense+=histogram[high];
             if(intense > threshold_intensity)
                 break;
         }
-        if(low == high)
+        if(low == high) {
+            free(histogram);
+            free(normalize_map);
             return;  // zero span bound
+        }
     }
 
     // Stretch the histogram to create the normalized image mapping.
     for(i=0; i <= MaxRGB; i++){
         if (i < (int) low)
             normalize_map[i]=0;
         else{
             if(i > (int) high)
                 normalize_map[i]=MaxRGB;
             else
                 normalize_map[i]=(MaxRGB-1)*(i-low)/(high-low);
         }
     }
     // Normalize
     if(img.depth() > 8){ // DirectClass
         unsigned int *data;
         for(y=0; y < img.height(); ++y){
             data = (unsigned int *)img.scanLine(y);
             for(x=0; x < img.width(); ++x){
                 data[x] = qRgba(normalize_map[qRed(data[x])],
                                 normalize_map[qGreen(data[x])],
                                 normalize_map[qBlue(data[x])],
                                 qAlpha(data[x]));
             }
         }
     }
     else{ // PsudeoClass
         int colors = img.numColors();
         unsigned int *cTable = img.colorTable();
         for(i=0; i < colors; ++i){
             cTable[i] = qRgba(normalize_map[qRed(cTable[i])],
                               normalize_map[qGreen(cTable[i])],
                               normalize_map[qBlue(cTable[i])],
                               qAlpha(cTable[i]));
         }
     }
     free(histogram);
     free(normalize_map);
 }
 
 
 void OImageEffect::equalize(QImage &img)
 {
     int *histogram, *map, *equalize_map;
     int x, y, i, j;
 
     unsigned int high, low;