[exim] gcc 8.3 warnings and local scan

[David Saez Padros via Exim-users]

Hi

I'm getting this warnings when compiling local scan functions with
gcc 8.3 and Exim 4.93
geoip.c:16:11: warning: implicit declaration of function ‘string_copy’; 
did you mean ‘strncpy’? [-Wimplicit-function-declaration]
  *yield = string_copy(US"Bad number of arguments");
           ^~~~~~~~~~~
           strncpy
geoip.c:16:9: warning: assignment to ‘uschar *’ {aka ‘unsigned char *’} 
from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  *yield = string_copy(US"Bad number of arguments");
         ^

--
Best regards ...

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   David Saez
   On-Line Services 2000 S.L.
   http://www.ols.es
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