include: Avoid redefinition of PEVENT_FILTER_DESCRIPTOR.

include/evntrace.h

@@ -248,15 +248,13 @@ typedef struct _EVENT_TRACE_PROPERTIES
     ULONG LoggerNameOffset;
 } EVENT_TRACE_PROPERTIES, *PEVENT_TRACE_PROPERTIES;
 
-typedef struct _EVENT_FILTER_DESCRIPTOR *PEVENT_FILTER_DESCRIPTOR;
-
 typedef struct _ENABLE_TRACE_PARAMETERS
 {
     ULONG                            Version;
     ULONG                            EnableProperty;
     ULONG                            ControlFlags;
     GUID                             SourceId;
-    PEVENT_FILTER_DESCRIPTOR EnableFilterDesc;
+    struct _EVENT_FILTER_DESCRIPTOR *EnableFilterDesc;
     ULONG                            FilterDescCount;
 } ENABLE_TRACE_PARAMETERS, *PENABLE_TRACE_PARAMETERS;