Fix the type for hw.ncpu, so sysctlbyname doesn't consistently fail on

64-bit architectures where sizeof(int) != sizeof(size_t).

MFC after: 1 week
PR: 206758
Reported by: Christoph Schönweiler <public2016@hauptsignal.at>
Submitted by: kib
Sponsored by: EMC / Isilon Storage Division

libexec/atrun/atrun.c

@@ -459,8 +459,9 @@ main(int argc, char *argv[])
     int c;
     int run_batch;
 #ifdef __FreeBSD__
-    size_t ncpu, ncpusz;
+    size_t ncpusz;
     double load_avg = -1;
+    int ncpu;
 #else
     double load_avg = LOADAVG_MX;
 #endif