native: fix function prototype to match to api
fix warning: invalid suffix on literal

C++11 requires a space between
literal and identifier [-Wliteral-suffix]
Fix possible null pointer dereference
Merge pull request #734 from mehlis/native-c++-fixes

C++ compiler warnings (native, core)
Fix the makefile of sys/random

The Makefile must not overwrite the include paths.
Merge pull request #750 from Kijewski/fix-sys-random

Fix the makefile of sys/random
Merge pull request #748 from authmillenon/fix-possible-null-pointer-errors

bughunt: Fix possible null pointer dereference