Fix nullpointer exception when running with LWJGLX-debug

[theVerySharpFlat]

Description

I added a call to this function after platform window creation as it initializes a MAX_VERTEX_ATTRIBS variable for the current OpenGL context which is then used as a size for the creation of an array which is accessed here. When this function isn't called, the length of the array is zero and thus this function call throws an index-out-of-bounds exception.

Note: This only occurs when LWJGLX-debug is used.

Type of change

• [X] Minor changes or tweaks (quality of life stuff)
• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

[SpaiR]

ImGuiImplGlfw is a generally purpose implementation. It is possible to make it to work with other renderes, not only with OpenGL. So, I would like to keep it as it is at the moment. If you really required to call GL#createCapabilities method here, I would recommend to copy the class locally instead.

[theVerySharpFlat]

ImGuiImplGlfw is a generally purpose implementation. It is possible to make it to work with other renderes, not only with OpenGL. So, I would like to keep it as it is at the moment. If you really required to call GL#createCapabilities method here, I would recommend to copy the class locally instead.

My thinking was that, since it helped me, it would help others. However, when I was trying to solve the issue, I didn't find any other people on the internet with the same problem, so I suppose this isn't necessary.

[SpaiR]

I'll close the PR, since of it fixes a specific problem which is not applicable to a general use case. Still, I believe it will be helpful to other people which will meet this problem. 👍