Fix a FORWARD_NULL defect in ExtractModuleName reported by Coverity....

sandbox/src/sandbox_nt_util.h

Index: sandbox/src/sandbox_nt_util.h
===================================================================
--- sandbox/src/sandbox_nt_util.h	(revision 21299)
+++ sandbox/src/sandbox_nt_util.h	(working copy)
@@ -118,9 +118,9 @@
 UNICODE_STRING* GetBackingFilePath(PVOID address);
 
 // Returns the last component of a path that contains the module name.
-// It will return NULL if the path is not a full path or if the path ends
-// with the path separator. The returned buffer must be freed with a placement
-// delete (see GetImageNameFromModule example).
+// It will return NULL if the path ends with the path separator. The returned
+// buffer must be freed with a placement delete (see GetImageNameFromModule
+// example).
 UNICODE_STRING* ExtractModuleName(const UNICODE_STRING* module_path);
 
 // Returns true if the parameters correspond to a dll mapped as code.