msi: Copy the assembly file directly if it's not compressed.

dlls/msi/action.c

@@ -5659,6 +5659,9 @@ static UINT ITERATE_PublishAssembly( MSIRECORD *rec, LPVOID param )
     file = msi_find_file(package, comp->KeyPath);
 
     GetTempPathW(MAX_PATH, path);
+
+    if (file->IsCompressed)
+    {
         r = msi_extract_file(package, file, path);
         if (r != ERROR_SUCCESS)
         {
@@ -5668,6 +5671,18 @@ static UINT ITERATE_PublishAssembly( MSIRECORD *rec, LPVOID param )
 
         PathAddBackslashW(path);
         lstrcatW(path, file->FileName);
+    }
+    else
+    {
+        PathAddBackslashW(path);
+        lstrcatW(path, file->FileName);
+
+        if (!CopyFileW(file->SourcePath, path, FALSE))
+        {
+            ERR("Failed to copy temporary assembly: %d\n", GetLastError());
+            return ERROR_FUNCTION_FAILED;
+        }
+    }
 
     r = install_assembly(path);
     if (r != ERROR_SUCCESS)