This prevents duplication of eater arrays for native EM engine levels
prior to version V6 (which had only four eater arrays). This is more
or less a cosmetical change only for the level editor when looking at
the eater arrays. There is no difference when playing such levels.
for (x = 0; x < 9; x++)
cav.eater_array[i][x] = map_emc[src[eater_offset[i] + x]];
+ if (file_version < FILE_VERSION_EM_V6)
+ cav.num_eater_arrays = 4;
+
/* ball */
temp = map_emc[src[2159]];