Merge remote-tracking branch 'greggman/get-texture-float-linear' into dev

src/renderers/WebGLRenderer.js

@@ -191,6 +191,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 	var _gl;
 
 	var _glExtensionTextureFloat;
+	var _glExtensionTextureFloatLinear;
 	var _glExtensionStandardDerivatives;
 	var _glExtensionTextureFilterAnisotropic;
 	var _glExtensionCompressedTextureS3TC;
@@ -7207,6 +7208,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 		}
 
 		_glExtensionTextureFloat = _gl.getExtension( 'OES_texture_float' );
+		_glExtensionTextureFloatLinear = _gl.getExtension( 'OES_texture_float_linear' );
 		_glExtensionStandardDerivatives = _gl.getExtension( 'OES_standard_derivatives' );
 
 		_glExtensionTextureFilterAnisotropic = _gl.getExtension( 'EXT_texture_filter_anisotropic' ) ||