transpile: reverse args in null_pointer_case

Co-authored-by: Rua <ruawhitepaw@gmail.com>

Author: kkysen

c2rust-transpile/src/translator/mod.rs

@@ -2715,7 +2715,7 @@ impl<'c> Translation<'c> {
             .ok_or_else(|| format_err!("bad condition type"))?;
 
         let null_pointer_case =
-            |is_null: bool, ptr: CExprId| -> TranslationResult<WithStmts<Box<Expr>>> {
+            |ptr: CExprId, is_null: bool| -> TranslationResult<WithStmts<Box<Expr>>> {
                 let val = self.convert_expr(ctx.used().decay_ref(), ptr, None)?;
                 let ptr_type = self.ast_context[ptr]
                     .kind
@@ -2729,25 +2729,25 @@ impl<'c> Translation<'c> {
             CExprKind::Binary(_, c_ast::BinOp::EqualEqual, null_expr, ptr, _, _)
                 if self.ast_context.is_null_expr(null_expr) =>
             {
-                null_pointer_case(target, ptr)
+                null_pointer_case(ptr, target)
             }
 
             CExprKind::Binary(_, c_ast::BinOp::EqualEqual, ptr, null_expr, _, _)
                 if self.ast_context.is_null_expr(null_expr) =>
             {
-                null_pointer_case(target, ptr)
+                null_pointer_case(ptr, target)
             }
 
             CExprKind::Binary(_, c_ast::BinOp::NotEqual, null_expr, ptr, _, _)
                 if self.ast_context.is_null_expr(null_expr) =>
             {
-                null_pointer_case(!target, ptr)
+                null_pointer_case(ptr, !target)
             }
 
             CExprKind::Binary(_, c_ast::BinOp::NotEqual, ptr, null_expr, _, _)
                 if self.ast_context.is_null_expr(null_expr) =>
             {
-                null_pointer_case(!target, ptr)
+                null_pointer_case(ptr, !target)
             }
 
             CExprKind::Unary(_, c_ast::UnOp::Not, subexpr_id, _) => {