Call file_map_init(). Otherwise the static lock isn't initialized.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29581 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/userlandfs/server/haiku/HaikuKernelFileSystem.cpp

@@ -15,6 +15,7 @@
 
 #include <block_cache.h>
 #include <condition_variable.h>
+#include <file_cache.h>
 
 #include "HaikuKernelIORequest.h"
 #include "HaikuKernelVolume.h"
@@ -121,6 +122,11 @@ HaikuKernelFileSystem::Init()
 	if (error != B_OK)
 		RETURN_ERROR(error);
 
+	// init file map
+	error = file_map_init();
+	if (error != B_OK)
+		RETURN_ERROR(error);
+
 	// create I/O request map
 	fIORequests = new(std::nothrow) IORequestTable;
 	if (fIORequests == NULL)