WINSPOOL: return correct error code in EnumPrinters

[Mike McCormack]

ChangeLog:
* return correct error code in EnumPrinters
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Index: dlls/winspool/info.c
===================================================================
RCS file: /home/wine/wine/dlls/winspool/info.c,v
retrieving revision 1.96
diff -u -r1.96 info.c
--- dlls/winspool/info.c	29 Oct 2004 21:27:38 -0000	1.96
+++ dlls/winspool/info.c	24 Nov 2004 07:11:29 -0000
@@ -2890,7 +2890,8 @@
 
     /* check input parameter */
     if((Level < 1) || (Level > 3)) {
-        ERR("unsupported level %ld \n", Level);
+        ERR("unsupported level %ld\n", Level);
+        SetLastError(ERROR_INVALID_LEVEL);
         return FALSE;
     }