[Bug] Fix null pointer deref in Clay_SetPointerState

[SogoCZE]

In some situations mapItem in Clay_SetPointerState can end up being null which results in to crash (because elementId is being accessed on null mapItem).

An example of this behaviour can be seen when you have an empty layout with only one text:

Clay_BeginLayout();

CLAY_TEXT(
    CLAY_ID("HelloWorldText"), 
    CLAY_STRING("Hello World!"),
    CLAY_TEXT_CONFIG(
        .fontId = FONT_ID_BODY_24, 
        .fontSize = 24,
         .textColor = {255, 0, 0, 255}
    )
);
                             
return Clay_EndLayout();

[nicbarker]

Hello, thanks for reporting this one! Taking a look now 👀

[nicbarker]

Seems like the entire second half of that if statement was just an incorrect case. Must have been left over from a refactor or something. Nice catch!