vita3k/interface: More detailed error message.

[Croden1999]

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• vita3k/interface: More detailed error message.
• gui/common_dialog: Add IsKeyPressed to the buttons.
• app/app_init: Fix typos.
• io/file: Add cstddef head file.

[Zangetsu38]

remove gui part, is not need charge it, set lang variable inside one emuenv variable

[Croden1999]

Mr. @EXtremeExploit , could you check the bulid?

[nn9dev]

i have no idea what could be causing it, but simply changing all of the instances of size_t to std::size_t in the file vita3k/io/include/io/file.h makes it build just fine on Linux. diff attached.
diff.txt

[Croden1999]

i have no idea what could be causing it, but simply changing all of the instances of to in the file makes it build just fine on Linux. diff attached. diff.txtsize_t``std::size_t``vita3k/io/include/io/file.h

thanks, sir

[Macdu]

Don't replace size_t with std::size_t, instead add #include <cstddef> at the top of io/file.h

[Croden1999]

Don't replace with , instead add at the top of io/file.hsize_t``std::size_t``#include <cstddef>

got it, thanks, sir.

[Macdu]

Thank you for this PR!

[Croden1999]

You're welcome, sir, also i want say thank you again.