Added dummy gamma controls to linux

src/native/linux/org_lwjgl_Display.cpp

@@ -222,3 +222,25 @@ JNIEXPORT jint JNICALL Java_org_lwjgl_Display_getPlatform
 {
 	return org_lwjgl_Display_PLATFORM_GLX;
 }
+
+/*
+ * Class:     org_lwjgl_Display
+ * Method:    getGammaRamp
+ * Signature: ()[I
+ */
+JNIEXPORT jboolean JNICALL Java_org_lwjgl_Display_getGammaRamp
+  (JNIEnv * env, jclass clazz, jintArray red, jintArray green, jintArray blue)
+{
+	return false;
+}
+
+/*
+ * Class:     org_lwjgl_Display
+ * Method:    setGammaRamp
+ * Signature: ([I[I[I)V
+ */
+JNIEXPORT jboolean JNICALL Java_org_lwjgl_Display_setGammaRamp
+  (JNIEnv * env, jclass clazz, jintArray red, jintArray green, jintArray blue)
+{
+	return false;
+}

src/native/linux/org_lwjgl_Sys.cpp

@@ -43,6 +43,7 @@
 #include <sys/time.h>
 #include <sys/resource.h>
 #include "org_lwjgl_Sys.h"
+#include <signal.h>
 
 long int		hires_timer_freq;			// Hires timer frequency
 long int		hires_timer_start;			// Hires timer start