Fix/warnings generated by flag wconversion

[nakarlsson]

Fix warnings for Wconversion

Approach

• Try to align types if there was an obvious mismatch
• Internal variables that don't reflect any HW or Protocol member, will be increase to size_t or uint32_t to avoid integer promotion
• Do bitwise operation instead of arithmetic to avoid integer promotion
• Last make an explicit type cast

fixes #148

[nakarlsson]

To enable Wconversion for regression on Linux and SOES core files I needed to do an easy fix of Linux esc_hw.c, just type casted

[nakarlsson]

Also, size_t did cause some trouble on x64 Linux so I took the decision to go for uint32_t instead of size_t.