Fix a little logic error

slstatus.c

@@ -169,7 +169,7 @@ cpu_freq(void)
 	int freq;
 
 	return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
-	               "%i", &freq) != 1) ?
+	               "%i", &freq) == 1) ?
 	       bprintf("%d", (freq + 500) / 1000) : unknown_str;
 }