SH-2908 Fix for incompatibility issue with GLSL 1.30

indra/llrender/llshadermgr.cpp

@@ -640,11 +640,15 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 
 		//backwards compatibility with legacy texture lookup syntax
 		text[count++] = strdup("#define texture2D texture\n");
-		text[count++] = strdup("#define texture2DRect texture\n");
 		text[count++] = strdup("#define textureCube texture\n");
 		text[count++] = strdup("#define texture2DLod textureLod\n");
 		text[count++] = strdup("#define	shadow2D(a,b) vec2(texture(a,b))\n");
-		text[count++] = strdup("#define shadow2DRect(a,b) vec2(texture(a,b))\n");
+
+		if (major_version > 1 || minor_version >= 40)
+		{ //GLSL 1.40 replaces texture2DRect et al with texture
+			text[count++] = strdup("#define texture2DRect texture\n");
+			text[count++] = strdup("#define shadow2DRect(a,b) vec2(texture(a,b))\n");
+		}
 	}
 
 	//copy preprocessor definitions into buffer