free: fix scaling on 32-bit systems

Systems that have a 32-bit long would give incorrect results in free.

References:
 Issue #89
 https://www.freelists.org/post/procps/frees-scale-size-broken-with-32bit-long

NEWS

@@ -2,6 +2,7 @@ procps-ng-3.3.14
 ----------------
   * pgrep: Don't segfault on non match                     Debian #894917
   * pgrep/pkill: Revert so matches all namespaces          issue #91
+  * free: Fix scaling on 32-bit systems                    issue #89
 
 procps-ng-3.3.13
 ----------------

free.c

@@ -133,7 +133,7 @@ static const char *scale_size(unsigned long size, int flags, struct commandline_
 		if (args.exponent > 1) {
 			/* In desired scale. */
 			snprintf(buf, sizeof(buf), "%ld",
-                 (long int)((size * 1024) / power(base, args.exponent-1))
+                 (long int)((size * 1024.0) / power(base, args.exponent-1))
 			    );
 			return buf;
 		}