Fix a 32-bit compilation issue in img2twit.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3642 92316355-f0b4-4df1-b90c-862c8a59935f

examples/img2twit.cpp

@@ -1227,7 +1227,7 @@ int main(int argc, char *argv[])
 
                 if(DEBUG_MODE)
                     fprintf(stderr, "%08i -0.%010i %2.010g after op%i(%i)\n",
-                            iter, (int)((error - newerr) * 10000000000L),
+                            iter, (int)((error - newerr) * 10000000000LL),
                             error, op1, pt);
 
                 error = newerr;