SH-534 Don't allow deferred rendering to be enabled on windows PC's with GL version less than 3.0.

indra/newview/featuretable.txt

-version 25
+version 26
 
 // NOTE: This is mostly identical to featuretable_mac.txt with a few differences
 // Should be combined into one table
@@ -275,6 +275,9 @@ RenderObjectBump			0	0
 list OpenGLPre15
 RenderVBOEnable				1	0
 
+list OpenGLPre30
+RenderDeferred				0	0
+
 list Intel
 RenderAnisotropic			1	0
 
@@ -561,3 +564,4 @@ list NVIDIA_GeForce_Go_7800
 RenderShaderLightingMaxLevel	1	2
 list NVIDIA_GeForce_Go_7900
 RenderShaderLightingMaxLevel	1	2
+

indra/newview/featuretable_xp.txt

-version 25
+version 26
 
 // NOTE: This is mostly identical to featuretable_mac.txt with a few differences
 // Should be combined into one table
@@ -267,6 +267,9 @@ RenderObjectBump			0	0
 list OpenGLPre15
 RenderVBOEnable				1	0
 
+list OpenGLPre30
+RenderDeferred				0	0
+
 list Intel
 RenderAnisotropic			1	0
 

indra/newview/llfeaturemanager.cpp

@@ -745,6 +745,10 @@ void LLFeatureManager::applyBaseMasks()
 	{
 		maskFeatures("OpenGLPre15");
 	}
+	if (gGLManager.mGLVersion < 3.f)
+	{
+		maskFeatures("OpenGLPre30");
+	}
 
 	// now mask by gpu string
 	// Replaces ' ' with '_' in mGPUString to deal with inability for parser to handle spaces