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added vsprintf() - sprintf with variable arguments list #76
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Hi, thanks for the lib!
I know that size-unsafe functions are not to be used. In one of my projects some 3rd party lib used both
vsprintf()andvsnprintf(). Which meant that allvsnprintf()were successfully replaced by your implementation, butvsprintf()was used from default newlib (in my case for STM32 MCU). This led to lot of confusion until I discovered there's novsprintf()implementation.That's why i added
vsprintf()function just so that all of the[v][s][n]printf()options are supported and replaced by the lib.P. S. I like to use this header file from GitHub to check for banned/unsafe functions :)