inseng: add a stub for DLLInstall

[Austin English]

-- 
-Austin
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diff --git a/dlls/inseng/inseng.spec b/dlls/inseng/inseng.spec
index b3a2ce2..82c0b4d 100644
--- a/dlls/inseng/inseng.spec
+++ b/dlls/inseng/inseng.spec
@@ -3,7 +3,7 @@
 @ stdcall CheckTrustEx(ptr ptr ptr ptr ptr)
 @ stdcall -private DllCanUnloadNow()
 @ stdcall -private DllGetClassObject(ptr ptr ptr)
-@ stub DllInstall
+@ stdcall DllInstall(long wstr)
 @ stdcall -private DllRegisterServer()
 @ stdcall -private DllUnregisterServer()
 @ stub DownloadFile
diff --git a/dlls/inseng/inseng_main.c b/dlls/inseng/inseng_main.c
index 94e1910..bd75eb7 100644
--- a/dlls/inseng/inseng_main.c
+++ b/dlls/inseng/inseng_main.c
@@ -92,3 +92,13 @@ BOOL WINAPI CheckTrustEx( LPVOID a, LPVOID b, LPVOID c, LPVOID d, LPVOID e )
     FIXME("%p %p %p %p %p\n", a, b, c, d, e );
     return TRUE;
 }
+
+/***********************************************************************
+ *  DllInstall (INSENG.@)
+ */
+HRESULT WINAPI DllInstall(BOOL bInstall, LPCWSTR cmdline)
+{
+    FIXME("(%s, %s): stub\n", bInstall ? "TRUE" : "FALSE", debugstr_w(cmdline));
+    return S_OK;
+}
+