Nuking some glsl warnings, and fixing relwithdebug compile(and prolly gcc too)

indra/newview/app_settings/shaders/class1/effects/glowF.glsl

@@ -5,6 +5,8 @@
  * $License$
  */
 
+#version 120
+
 uniform sampler2D diffuseMap;
 uniform float glowStrength;
 

indra/newview/app_settings/shaders/class2/effects/blurF.glsl

@@ -5,6 +5,8 @@
  * $License$
  */
 
+#extension GL_ARB_texture_rectangle : enable
+
 uniform sampler2DRect RenderTexture;
 uniform float bloomStrength;
 

indra/newview/app_settings/shaders/class2/effects/colorFilterF.glsl

@@ -5,6 +5,8 @@
  * $License$
  */
 
+#extension GL_ARB_texture_rectangle : enable
+
 uniform sampler2DRect RenderTexture;
 uniform float brightness;
 uniform float contrast;

indra/newview/app_settings/shaders/class2/effects/extractF.glsl

@@ -5,6 +5,8 @@
  * $License$
  */
 
+#extension GL_ARB_texture_rectangle : enable
+
 uniform sampler2DRect RenderTexture;
 uniform float extractLow;
 uniform float extractHigh;

indra/newview/app_settings/shaders/class2/effects/gaussBlurF.glsl

@@ -1,3 +1,6 @@
+
+#extension GL_ARB_texture_rectangle : enable
+
 uniform sampler2DRect RenderTexture;
 uniform int horizontalPass;
 

indra/newview/app_settings/shaders/class2/effects/nightVisionF.glsl

@@ -4,6 +4,8 @@
  * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
  * $License$
  */
+ 
+#extension GL_ARB_texture_rectangle : enable
 
 uniform sampler2DRect RenderTexture;
 uniform sampler2D NoiseTexture;

indra/newview/app_settings/shaders/class2/effects/simpleF.glsl

@@ -5,6 +5,8 @@
  * $License$
  */
 
+#extension GL_ARB_texture_rectangle : enable
+
 uniform sampler2DRect RenderTexture;
 
 void main(void)