[0.4.9] cherry-pick [MSPAINT] Fix divide by zero in drawZoomFrame

CORE-14539 #resolve

(cherry picked from commit 8c726ae)

Author: binarymaster

base/applications/mspaint/imgarea.cpp

@@ -41,8 +41,14 @@ void CImgAreaWindow::drawZoomFrame(int mouseX, int mouseY)
     int x, y, w, h;
     scrollboxWindow.GetClientRect(&clientRectScrollbox);
     GetClientRect(&clientRectImageArea);
-    w = clientRectImageArea.right * clientRectScrollbox.right / (clientRectImageArea.right * 2);
-    h = clientRectImageArea.bottom * clientRectScrollbox.bottom / (clientRectImageArea.bottom * 2);
+    w = clientRectImageArea.right * 2;
+    h = clientRectImageArea.bottom * 2;
+    if (!w || !h)
+    {
+        return;
+    }
+    w = clientRectImageArea.right * clientRectScrollbox.right / w;
+    h = clientRectImageArea.bottom * clientRectScrollbox.bottom / h;
     x = max(0, min(clientRectImageArea.right - w, mouseX - w / 2));
     y = max(0, min(clientRectImageArea.bottom - h, mouseY - h / 2));