diff -r 31a43d94cc26 -r 8e3ae153e2c9 src/File.cpp
--- a/src/File.cpp	Sun Sep 20 15:14:12 2009 -0700
+++ b/src/File.cpp	Thu Sep 24 10:28:50 2009 -0700
@@ -88,7 +88,7 @@
     }
     
     size_t File::writePadding (int alignment) {
-        off_t pad = alignment - (position() & (alignment-1));
+        int pad = alignment - (int)(position() & (alignment-1));
         if (pad == alignment)
             return 0;
         uint8_t zero[pad];