wine-devel openmpt fix

--- /home/monsterovich/winnt.h  2017-02-28 14:44:54.537875663 +0200
+++ /opt/wine-devel/include/wine/windows/winnt.h    2017-02-28 14:45:09.203541919 +0200
@@ -5438,7 +5438,7 @@

 static FORCEINLINE void *RtlSecureZeroMemory(void *buffer, SIZE_T length)
 {
-    volatile char *ptr = buffer;
+    volatile char *ptr = (char*)buffer;

     while (length--) *ptr++ = 0;
     return buffer;