hddstat.cpp: move init of cHddStat inside geInstance()

Origin commit data
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Commit: c30b3ece65
Author: vanhofen <vanhofen@gmx.de>
Date: 2014-11-13 (Thu, 13 Nov 2014)

Origin message was:
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- hddstat.cpp: move init of cHddStat inside geInstance()

src/system/hddstat.cpp

@@ -41,10 +41,10 @@
 #include <driver/record.h>
 #include <driver/display.h>
 
-static cHddStat *instance = NULL;
-
 cHddStat *cHddStat::getInstance(void)
 {
+	static cHddStat *instance = NULL;
+
 	if (!instance)
 		instance = new cHddStat;
 	return instance;