Added patch to improve performance of LdrGetDllHandle when DLL is not loaded.

patches/ntdll-LdrGetDllHandle/0001-ntdll-Improve-speed-of-LdrGetDllHandle-when-searchin.patch

@@ -0,0 +1,30 @@
+From 2689c394dda377cdda8099164e561bfed4b07962 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
+Date: Wed, 15 Feb 2017 16:50:04 +0100
+Subject: ntdll: Improve speed of LdrGetDllHandle when searching for the
+ basename of modules that are not loaded.
+
+FIXME: Can we do a similar optimization when the activation context is present?
+---
+ dlls/ntdll/loader.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/dlls/ntdll/loader.c b/dlls/ntdll/loader.c
+index 1168bad03ae..97cde883545 100644
+--- a/dlls/ntdll/loader.c
++++ b/dlls/ntdll/loader.c
+@@ -2506,6 +2506,11 @@ static NTSTATUS find_dll_file( const WCHAR *load_path, const WCHAR *libname,
+             RtlFreeHeap( GetProcessHeap(), 0, dllname );
+             return status;
+         }
++        else if (!handle)
++        {
++            /* Do not resolve full name if basename cannot be found */
++            return STATUS_DLL_NOT_FOUND;
++        }
+     }
+ 
+     if (RtlDetermineDosPathNameType_U( libname ) == RELATIVE_PATH)
+-- 
+2.11.0
+

patches/ntdll-LdrGetDllHandle/definition

@@ -0,0 +1 @@
+Fixes: Improve performance of LdrGetDllHandle when DLL is not loaded