Replaced undefined uint with standard type unsigned int

[piercecomerford]

On both Alma Linux 9.3 and a recent version of Void Linux musl, NEST fails to compile, in particular citing

/home/<user>/src/nest/src/execNEST.cpp:35:1: error: 'uint' does not name a type; did you mean 'int'?
   35 | uint SaveTheDates[tMax] = {0};
      | ^~~~
      | int

which seems to be caused by the codebase implicitly assuming a type uint exists. To my knowledge uint is not a standard type and is only implemented as a typedef for unsigned int by some compilers. With this change, NEST successfully compiles on the above-mentioned systems.