Previous PR #45 broke some platforms due to type mismatch

[jphickey]

Describe the bug
A recent change in pull request #45 changed the TO_LAB_init function prototype to return an int32 type here:

to_lab/fsw/src/to_lab_app.c

Line 83 in 7e7dc4b

int32 TO_LAB_init(void);

However the function is actually defined later here:

to_lab/fsw/src/to_lab_app.c

Line 158 in 7e7dc4b

int TO_LAB_init(void)

This results in error if int and int32 are not actually the same type.

To Reproduce
Build on any platform where int and int32 are not the same type (e.g. 32 bit RTEMS, for example).

Expected behavior
Declaration should match definition, and it should build cleanly.

System observed on:
RTEMS 4.11.3 (cross)

Reporter Info
Joseph Hickey, Vantage Systems, Inc.