Fix clang warnings in xen_events

warning: implicit conversion from enumeration
type 'compat_memaccess_t' to different enumeration type 'hvmmem_access_t'

warning: comparison of constant
'MEMACCESS_INVALID' (-1) with expression of type 'mem_access_t'
(aka 'hvmmem_access_t') is always false
Add missing case for VMI_PM_AARCH32 in Linux init
Merge pull request #222 from tklengyel/arm_case

Add missing case for VMI_PM_AARCH32 in Linux init
Fix memory leak on error condition in events init
Add missing breaks in ARM PT lookup
Switch vmi_init char* to const char*
Merge pull request #226 from tklengyel/arm_break_fix

Add missing breaks in ARM PT lookup
Merge pull request #225 from tklengyel/events_leak_fix

Fix memory leak on error condition in events init
Fix returning uninitialized status_t in Xen on error
Fix implicit function declaration warning
Merge pull request #227 from tklengyel/coverity_fixes

Fix returning uninitialized status_t in Xen on error
Merge pull request #228 from tklengyel/arm_init_fix

Fix implicit function declaration warning
Merge pull request #223 from tklengyel/cast_fix

Fix clang warnings in xen_events
Merge pull request #224 from tklengyel/const

Switch vmi_init char* to const char*