fix pushAutoFunction to use lowercased pointer size

This was changed in commit ziglang/zig@af6bad4

Author: challengee

src/lib.zig

@@ -4699,7 +4699,7 @@ pub const Lua = opaque {
                 inline for (info.@"fn".params, 0..) |param, i| {
                     const param_info = @typeInfo(param.type.?);
                     //only use the overhead of creating the arena allocator if needed
-                    if (comptime param_info == .pointer and param_info.pointer.size != .One) {
+                    if (comptime param_info == .pointer and param_info.pointer.size != .one) {
                         const parsed = lua.toAnyAlloc(param.type.?, (i + 1)) catch |err| {
                             lua.raiseErrorStr(@errorName(err), .{});
                         };

src/tests.zig

@@ -2656,6 +2656,10 @@ fn bar(a: i32, b: i32) !i32 {
     return a + b;
 }
 
+fn baz(a: []const u8) usize {
+    return a.len;
+}
+
 test "autoPushFunction" {
     var lua = try Lua.init(testing.allocator);
     defer lua.deinit();
@@ -2667,17 +2671,25 @@ test "autoPushFunction" {
     lua.autoPushFunction(bar);
     lua.setGlobal("bar");
 
+    lua.autoPushFunction(baz);
+    lua.setGlobal("baz");
+
     try lua.doString(
         \\result = foo(1, 2)
     );
     try lua.doString(
         \\local status, result = pcall(bar, 1, 2)
     );
 
+    try lua.doString(
+        \\result = baz("test")
+    );
+
     //automatic api construction
     const my_api = .{
         .foo = foo,
         .bar = bar,
+        .baz = baz,
     };
 
     try lua.pushAny(my_api);