[Freeciv-Dev] quick patch for cityturn.c

[Mike Kaufman <mkaufman@xxxxxxxxxxxxxx>]

I'm picking up my work on civworld, and have found a couple of things
need to be done to ease maintenance, etc (and make it work).

The attached patch allows a civworld user to change the size of a city 
without having to worry about granary size and other useless information.
The patch is obviously correct. It merely removes the static type from
the function needed and puts the prototype in the header file.

Please apply soon.

-mike

cityturn_patch
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