CPAcquireContext: Set last error to ERROR_SUCCESS in case of success.

dlls/rsaenh/rsaenh.c

diff --git a/dlls/rsaenh/rsaenh.c b/dlls/rsaenh/rsaenh.c
index a45cf4e..5a2f036 100644
--- a/dlls/rsaenh/rsaenh.c
+++ b/dlls/rsaenh/rsaenh.c
@@ -938,6 +938,8 @@
     TRACE("(phProv=%p, pszContainer=%s, dwFlags=%08lx, pVTable=%p)\n", phProv, 
           debugstr_a(pszContainer), dwFlags, pVTable);
 
+    SetLastError(ERROR_SUCCESS);
+	
     if (!load_lib()) return FALSE;
     
     if (pszContainer ? strlen(pszContainer) : 0)