[Tcsh] FYI: Deprecation warning

[H.Merijn Brand]

Linux 5.12.9-1-default [openSUSE Tumbleweed 20210605]
gcc (SUSE Linux) 11.1.1 20210510 [revision 23855a176609fe8dda6abaf2b21846b4517966eb]

tc.alloc.c: In function ‘showall’:
tc.alloc.c:644:5: warning: ‘mallinfo’ is deprecated [-Wdeprecated-declarations]
  644 |     mi = mallinfo();
      |     ^~
In file included from tc.alloc.c:42:
/usr/include/malloc.h:118:24: note: declared here
  118 | extern struct mallinfo mallinfo (void) __THROW __MALLOC_DEPRECATED;
      |                        ^~~~~~~~

-- 
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