histogram.c: fix a shadowing declaration.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3409 92316355-f0b4-4df1-b90c-862c8a59935f

pipi/analysis/histogram.c

@@ -64,12 +64,12 @@ int pipi_get_image_histogram(pipi_image_t *img, pipi_histogram_t*h, int flags)
             h->b[data[i]]++;
         if(flags&PIPI_COLOR_Y)
         {
-            uint32_t p = 0.;
-            p += 0.299 * data[i];
-            p += 0.587 * data[i+1];
-            p += 0.114 * data[i+2];
+            uint32_t val = 0.;
+            val += 0.299 * data[i];
+            val += 0.587 * data[i+1];
+            val += 0.114 * data[i+2];
 
-            h->y[p>255?255:p]++;
+            h->y[val>255?255:val]++;
         }
     }