vbscript: Avoid using bool keyword.

dlls/vbscript/parser.y

@@ -100,7 +100,7 @@ static const WCHAR propertyW[] = {'p','r','o','p','e','r','t','y',0};
     case_clausule_t *case_clausule;
     unsigned uint;
     LONG lng;
-    BOOL bool;
+    BOOL boolean;
     double dbl;
 }
 
@@ -129,7 +129,7 @@ static const WCHAR propertyW[] = {'p','r','o','p','e','r','t','y',0};
 %type <expression> ConstExpression NumericLiteralExpression
 %type <member> MemberExpression
 %type <expression> Arguments_opt ArgumentList_opt Step_opt ExpressionList
-%type <bool> OptionExplicit_opt DoType
+%type <boolean> OptionExplicit_opt DoType
 %type <arg_decl> ArgumentsDecl_opt ArgumentDeclList ArgumentDecl
 %type <func_decl> FunctionDecl PropertyDecl
 %type <elseif> ElseIfs_opt ElseIfs ElseIf