Merge pull request #1761 from kraj/riscv

riscv doesn't require pointers to be aligned

common/arch.h

@@ -84,7 +84,8 @@ typedef int bool_t;
 #define NEED_ALIGN
 #elif defined(__x86__) || defined(__x86_64__) || \
       defined(__AMD64__) || defined(_M_IX86) || defined (_M_AMD64) || \
-      defined(__i386__) || defined(__aarch64__)
+      defined(__i386__) || defined(__aarch64__) || \
+      defined(__riscv)
 #define NO_NEED_ALIGN
 #else
 #warning unknown arch

sesman/chansrv/sound.c

@@ -23,7 +23,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/socket.h>
-#include <sys/errno.h>
+#include <errno.h>
 #include <signal.h>
 #include <sys/un.h>