sysinfos: fix some file leaks

api.cpp

@@ -321,8 +321,12 @@ static const char* os_name()
 	return "windows";
 #else
 	FILE *fd = fopen("/proc/version", "r");
-	if (!fd || !fscanf(fd, "Linux version %48s", &os_version[6]))
+	if (!fd)
 		return "linux";
+	if (!fscanf(fd, "Linux version %48s", &os_version[6])) {
+		fclose(fd);
+		return "linux";
+	}
 	fclose(fd);
 	os_version[48] = '\0';
 	return (const char*) os_version;

sysinfos.cpp

@@ -50,8 +50,9 @@ static uint32_t linux_cpufreq(int core)
 		return freq;
 
 	if (!fscanf(fd, "%d", &freq))
-		return freq;
+		;
 
+	fclose(fd);
 	return freq;
 }