apphelp: Add a stub for SdbCloseDatabase.

dlls/apphelp/apphelp.c

@@ -106,3 +106,8 @@ TAGID WINAPI SdbGetFirstChild(PDB pdb, TAGID parent)
     FIXME("stub: %p %d\n", pdb, parent);
     return TAGID_NULL;
 }
+
+void WINAPI SdbCloseDatabase(PDB pdb)
+{
+    FIXME("stub: %p\n", pdb);
+}

dlls/apphelp/apphelp.spec

@@ -22,7 +22,7 @@
 @ stub SdbApphelpNotifyExSdbApphelpNotifyEx
 @ stub SdbBuildCompatEnvVariables
 @ stub SdbCloseApphelpInformation
-@ stub SdbCloseDatabase
+@ stdcall SdbCloseDatabase(ptr)
 @ stub SdbCloseDatabaseWrite
 @ stub SdbCloseLocalDatabase
 @ stub SdbCommitIndexes