[client] moved common headers outside of the client project's directory

client/Makefile

@@ -1,4 +1,4 @@
-CFLAGS=-g -Og -std=gnu99 -march=native -Wall -Werror -I./ -DDEBUG
+CFLAGS=-g -Og -std=gnu99 -march=native -Wall -Werror -I../common -DDEBUG
 LDFLAGS=-lrt -lGL
 
 CFLAGS+=`pkg-config --cflags sdl2`

client/spice/spice.c

@@ -21,7 +21,7 @@
 #include <spice/protocol.h>
 #include <spice/error_codes.h>
 
-#include "spice/messages.h"
+#include "messages.h"
 
 #ifdef DEBUG_SPICE_MOUSE
   #define DEBUG_MOUSE(fmt, args...) DEBUG_PRINT("[M]", fmt, ##args)