libosmocore[master]: utils: add osmo_strscpy() macro to use sizeof(dst)

[Neels Hofmeyr]

Patch Set 5:

> > You might also implement it as a static inline
 > > instead of a macro

 > Will sizeof() work with a static inline??
 
no:

  #include <stdio.h>

  static inline size_t sz(char *dest)
  {
    return sizeof(dest);
  }

  int main(void)
  {
    char buf[123];
    printf("%zu\n", sz(buf));
    return 0;
  }

prints:

  8

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Gerrit-MessageType: comment
Gerrit-Change-Id: Ie973fc51835066540eba7ed2946ddf33a268b022
Gerrit-PatchSet: 5
Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Holger Freyther <holger at freyther.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Max <msuraev at sysmocom.de>
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-HasComments: No