Organize the include of header files

- `#include <math.h>` is done in `mruby.h`.
  Eliminate the need to worry about the `MRB_NO_FLOAT` macro.

- Include mruby header files before standard header files.
  If the standard header file is already placed before `mruby.h`, the standard header file added in the future tends to be placed before `mruby.h`.

This change should some reduce the chances of macros that must be defined becoming undefined in C++ or including problematic header files in a particular mruby build configuration.

1 files changed, 0 insertions, 3 deletions

diff --git a/src/vm.c b/src/vm.c
index 57531797c..50ad3b31d 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -20,9 +20,6 @@
 #include <mruby/throw.h>
 #include <mruby/dump.h>
 #include <mruby/presym.h>
-#ifndef MRB_NO_FLOAT
-#include <math.h>
-#endif
 
 #ifdef MRB_NO_STDIO
 #if defined(__cplusplus)