kernel32: add stub for SetFileValidData

[Austin English]

Fixes a crash in WoW Cataclysm Beta. See
http://bugs.winehq.org/show_bug.cgi?id=23477

-- 
-Austin
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diff --git a/dlls/kernel32/file.c b/dlls/kernel32/file.c
index edec6b0..c6a21df 100644
--- a/dlls/kernel32/file.c
+++ b/dlls/kernel32/file.c
@@ -1001,6 +1001,16 @@ error:
 }
 
 /***********************************************************************
+ *           SetFileValidData   (KERNEL32.@)
+ */
+BOOL WINAPI SetFileValidData( HANDLE hFile, LONGLONG ValidDataLength )
+{
+    FIXME("stub: %p, %llu\n", hFile, ValidDataLength);
+    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+    return FALSE;
+}
+
+/***********************************************************************
  *           GetFileTime   (KERNEL32.@)
  */
 BOOL WINAPI GetFileTime( HANDLE hFile, FILETIME *lpCreationTime,
diff --git a/dlls/kernel32/kernel32.spec b/dlls/kernel32/kernel32.spec
index 843e97c..a0b729d 100644
--- a/dlls/kernel32/kernel32.spec
+++ b/dlls/kernel32/kernel32.spec
@@ -1028,7 +1028,7 @@
 # @ stub SetFileShortNameA
 # @ stub SetFileShortNameW
 @ stdcall SetFileTime(long ptr ptr ptr)
-# @ stub SetFileValidData
+@ stdcall SetFileValidData(ptr double)
 # @ stub SetFirmwareEnvironmentVariableA
 # @ stub SetFirmwareEnvironmentVariableW
 @ stdcall SetHandleContext(long long)