Patched snprintf() calls to provide required format specifiers

[dje4321]

Unable to compile on linux due to missing format specifiers per the CPP reference.
https://cplusplus.com/reference/cstdio/snprintf

PR patches snprintf() calls to provide the required format specifiers.

[dje4321]

Important thing to note. Not all snprintf() calls were checked. Only patched those that were preventing compilation.

There are some potential security implications by not passing in the required format specifier, however since this is a premade application with no real user inputs, none of those implications are particularly relevant.