sysctl --system loads default config file

Commit cdca71e945 fixed
the loading the sysctl.conf file, but had the logic
for checking the file exists reversed incorrectly.

NEWS

@@ -1,3 +1,7 @@
+procps-ng-3.3.10
+----------------
+  * sysctl --system loads default config file - Debian #732920
+
 procps-ng-3.3.9
 ---------------
   * kernel namespaces support added to skill, pgrep, ps and top

sysctl.c

@@ -640,7 +640,7 @@ static int PreloadSystem(void)
 	}
 
 
-	if (stat(DEFAULT_PRELOAD, &ts) < 0 && S_ISREG(ts.st_mode)) {
+	if (stat(DEFAULT_PRELOAD, &ts) < 0 || S_ISREG(ts.st_mode)) {
 		if (!Quiet)
 			printf(_("* Applying %s ...\n"), DEFAULT_PRELOAD);
 		rc |= Preload(DEFAULT_PRELOAD);