set pixels with no coverage to all zero

valgrind complained about use of uninitialized values

diff --git a/rotate.im b/rotate.im
index 861810d48c5ab308b62291166252570e9532f352..250d778bc0d91a298d6a54f42fe320725e83b2a8 100644 (file)
--- a/rotate.im
+++ b/rotate.im
@@ -152,6 +152,10 @@ static i_color interp_i_color(i_color before, i_color after, double pos,
        out.channel[ch] = I_LIMIT_8(out_level);
       }
     }
+    else {
+      for (ch = 0; ch < channels-1; ++ch)
+       out.channel[ch] = 0;
+    }
 
     out.channel[channels-1] = total_cover;
   }
@@ -188,6 +192,10 @@ static i_fcolor interp_i_fcolor(i_fcolor before, i_fcolor after, double pos,
        out.channel[ch] = I_LIMIT_DOUBLE(out_level);
       }
     }
+    else {
+      for (ch = 0; ch < channels-1; ++ch)
+       out.channel[ch] = 0;
+    }
 
     out.channel[channels-1] = total_cover;
   }