fix: mrbgems\mruby-time\src\time.c(641): warning C4244: '=': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-time\src\time.c(372): warning C4244: 'function': conversion from 'mrb_int' to 'double', possible loss of data

fix: mrbgems\mruby-test\driver.c(67): warning C4244: '=': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-string-ext\src\string.c(49): warning C4244: '=': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-string-ext\src\string.c(30): warning C4244: '=': conversion from 'mrb_int' to 'long', possible loss of data

fix: mrbgems\mruby-string-ext\src\string.c(38): warning C4244: '=': conversion from 'mrb_int' to 'char', possible loss of data

fix: mrbgems\mruby-sprintf\src\sprintf.c(1052): warning C4244: '+=': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-sprintf\src\sprintf.c(623): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-sprintf\src\sprintf.c(646): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-sprintf\src\sprintf.c(618): warning C4244: 'initializing': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-sprintf\src\sprintf.c(516): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-math\src\math.c(660): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-math\src\math.c(491): warning C4244: '=': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-kernel-ext\src\kernel.c(114): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-fiber\src\fiber.c(215): warning C4244: '=': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-exit\src\mruby-exit.c(10): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-eval\src\eval.c(301): warning C4244: 'function': conversion from 'mrb_int' to 'int', possible loss of data

fix: mrbgems\mruby-eval\src\eval.c(214): warning C4244: '=': conversion from 'mrb_int' to 'short', possible loss of data

fix: mrbgems\mruby-compiler\core\parse.y(3455): warning C4244: 'function': conversion from 'intptr_t' to 'int', possible loss of data

fix: include\mruby/gc.h(43): warning C4200: nonstandard extension used: zero-sized array in struct/union

Change DISABLE_STDIO to MRB_DISABLE_STDIO in mruby-time/time.c

After f68f5f6b, the operand of `OP_EPOP` should have been `1`.
Now we have removed the limitation.

fix #3809

If `#initialize` is implemented in C, we don't need stack consuming
`mrb_funcall`.

Instead of `irep -> proc` chain, we use `irep -> irep` chain to
avoid GC bugs like #3804. We added `target_class` reference to
`mrb_irep` struct. That means one more word consumption per `irep`.

Trying to make the code more readable

Update print.c

Strings not containing a newline are not printed synchronously
ex. bin/mruby -e '["a", "b", "c", "\n", "d", "e", "f", "\n"].each {|e| print e ; usleep 200000}'

Trying to make the source code more understandable by removing mixing of ternary if statements with attributions.