Added changes for escaping from rendering by pressing the ESC key.

ESC key press checks are performed 1) before entering Freestyle, and
2) after the completion of the view map creation.

source/blender/freestyle/intern/blender_interface/FRS_freestyle.cpp

@@ -123,6 +123,8 @@ extern "C" {
 		// load mesh
 		if( controller->LoadMesh(re, srl) ) // returns if scene cannot be loaded or if empty
 			return;
+        if( re->test_break(re->tbh) )
+            return;
 		
 		// add style modules
 		FreestyleConfig* config = &srl->freestyleConfig;
@@ -234,6 +236,11 @@ extern "C" {
 				//   - compute view map
 				prepare(re, srl);
 
+                if( re->test_break(re->tbh) ) {
+					controller->CloseFile();
+                    break;
+                }
+
 				// render and composite Freestyle result
 				if( controller->_ViewMap ) {
 					

source/blender/render/intern/source/pipeline.c

@@ -1877,7 +1877,8 @@ static void do_render_3d(Render *re)
 	
 	/* Freestyle  */
 	if( re->r.mode & R_EDGE_FRS && re->r.renderer==R_INTERN)
-		FRS_add_Freestyle(re);
+		if(!re->test_break(re->tbh))
+			FRS_add_Freestyle(re);
 		
 	/* free all render verts etc */
 	RE_Database_Free(re);