fix: LSDV-4757: Fix brush crashing (#1248)

Fix brush crashing

Co-authored-by: hlomzik <[email protected]>

Author: nick-skriabin

src/tools/Brush.js

@@ -117,7 +117,7 @@ const _Tool = types
       },
 
       updateCursor() {
-        if (!self.selected || !self.obj.stageRef) return;
+        if (!self.selected || !self.obj?.stageRef) return;
         const val = self.strokeWidth;
         const stage = self.obj.stageRef;
         const base64 = Canvas.brushSizeCircle(val);

src/tools/Erase.js

@@ -96,7 +96,7 @@ const _Tool = types
 
     return {
       updateCursor() {
-        if (!self.selected || !self.obj.stageRef) return;
+        if (!self.selected || !self.obj?.stageRef) return;
         const val = 24;
         const stage = self.obj.stageRef;
         const base64 = Canvas.brushSizeCircle(val);

src/tools/Zoom.js

@@ -89,7 +89,7 @@ const _Tool = types
     },
 
     updateCursor() {
-      if (!self.selected || !self.obj.stageRef) return;
+      if (!self.selected || !self.obj?.stageRef) return;
 
       self.stageContainer.style.cursor = 'grab';
     },