Added StringConverter::ToString for int and float

[mgerhardy]

No description provided.

[floooh]

StringBuilder is a bit heavy for this, please use std::snprintf() into a char buffer on the stack (for instance, like here:

oryol/code/Modules/Core/Log.cc

Line 188 in c220682

std::snprintf(buf, sizeof(buf), "{\"msg\":\"log\",\"val\":\"oryol assert: cond='%s'\nmsg='%s'\nfile='%s'\nline='%d'\nfunc='%s'\"}",

)

Also, you could be the first to add a few tests for this to

oryol/code/Modules/Core/UnitTests/StringConverterTest.cc

Line 11 in c220682

/// @todo IMPLEMENT STRING CONVERTER TEST!!!

;)