Fix clang build warnings

src/gfx_compilers.h

@@ -335,8 +335,8 @@
 		#define GFX_COMPILER_TESTED					TRUE
 		#define GFX_COMPILER_VERSION_MAJOR			(__clang_major__)
 		#define GFX_COMPILER_VERSION_MINOR			(__clang_minor__)
-		#define GFX_COMPILER_VERSION_PATCH			(__clang_patchlevel__)
-		#define DEPRECATED(msg)						__attribute__((deprecated(msg)));
+        #define GFX_COMPILER_VERSION_PATCH			(__clang_patchlevel__)
+		#define DEPRECATED(msg)						__attribute__((deprecated(msg)))
 	#elif GFX_COMPILER == GFX_COMPILER_COMEAU
 		#define GFX_COMPILER_NAME					"Comeau C++"
 		#define GFX_COMPILER_VERSION_MAJOR			((__COMO_VERSION__)/100)

src/gos/gos_osx.h

@@ -13,6 +13,7 @@
 #include <sys/types.h>
 #include <stdint.h>
 #include <pthread.h>
+#include <stdlib.h>
 
 /* Already defined int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, size_t */
 

src/gos/gos_qt.cpp

@@ -7,12 +7,12 @@
 
 #include "../../gfx.h"
 
+#if GFX_USE_OS_QT
 #include <QMutex>
 #include <QSemaphore>
 #include <QThread>
 #include <QElapsedTimer>
 
-#if GFX_USE_OS_QT
 
 class Thread : public QThread
 {