libvmi.h : fix implicit declaration warning generated by use of memset in interface.c and strncmp in accessors.c
private.h: add function prototype for windows_pid_to_pgd to fix implicit declaration warning from its use in memory.c
private.h: add function prototype for windows_symbol_to_address to fix implicit declaration warning from its use in memory.c
private.h: add function prototype for linux_pid_to_pgd to fix implicit declaration warning from its use in memory.c
xen.c: fix two incorrect format strings (needed %lu rather than %d because corresponding parameter is unsigned)
windows core.c : include local peparse.h header to fix implicit declaration warning generated by use of peparse_validate_pe_image
windows core.c : fix incorrect format string (need %lx rather than %llx : parameter is type uint64_t)
windows kpcr.c : fix incorrect format string (need %lx rather than %llx : parameter is type uint64_t)
windows memory.c : include interface.h header to fix implicit declaration warning generated by use of driver_get_vcpureg
process-list.c : fix warning about signedness when using an int rather than uint32_t as an argument to vmi_read_32_va