winspool: [1/4] Add a missing export

[Detlef Riekenberg]

We now search for local Printers in winspool.drv,DllMain on every
DLL_PROCESS_ATTACH. ("WINSPOOL_LoadSystemPrinters")

This need a long time and is done much to often, because nearly all
GUI Application link to "winspool.drv", but should be only done, when
an Application use the Printer.

Writing the Postcript-Code to a File and send it to CUPS/LPR is 
splitted in "winspool.drv" (CreateFile) and "wineps.drv" / "gdi.exe"
(WritePrinter16). 
The correct location is the Local Portmonitor (StartDoc / WritePrinter)

GDI is also wrong, because it creates a file named "FILE:", but should
call winspool.drv (bug 3975)


This Patchset is the start to move the CUPS / LPR dependent code to
"localspl.dll". This allow us to use CUPS for printing and we need to
use UNICODE (bug 6437)
Since I do not like to create a wine-specific export in "localspl.dll"
for that, InitializePrintProvidor() is reused.

To avoid a crash with native "localspl.dll" or "spoolss.dll",
some stubs / missing exports are needed.


winspool: Add a missing export for SpoolerPrinterEvent


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By by ... Detlef

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