oleaut32: Fix the loading of the parameter name for SLTG propget functions.

The parameter could have an offset of 0xffff/0xfffe, in which case the
parameter name should be the name of the function, rather than NULL.

dlls/oleaut32/typelib.c

@@ -3308,6 +3308,9 @@ static void SLTG_DoFuncs(char *pBlk, char *pFirstItem, ITypeInfoImpl *pTI,
 	    if(paramName) {
 	        (*ppFuncDesc)->pParamDesc[param].Name =
 		  TLB_MultiByteToBSTR(paramName);
+	    } else {
+	        (*ppFuncDesc)->pParamDesc[param].Name =
+                  SysAllocString((*ppFuncDesc)->Name);
 	    }
 	}