Don't unnecessarily resize windows in sk_app on X

tools/viewer/sk_app/Window.h

Index: tools/viewer/sk_app/Window.h
diff --git a/tools/viewer/sk_app/Window.h b/tools/viewer/sk_app/Window.h
index 9ced74784a62a3845992c10e9c4f5a59ba35dbce..eab8c1df545f716541a49e0b01a66536b161d5a4 100644
--- a/tools/viewer/sk_app/Window.h
+++ b/tools/viewer/sk_app/Window.h
@@ -158,8 +158,8 @@ public:
     void onPaint();
     void onResize(uint32_t width, uint32_t height);
 
-    uint32_t width() { return fWidth; }
-    uint32_t height() { return fHeight;  }
+    int width() { return fWidth; }
+    int height() { return fHeight;  }
 
     virtual const DisplayParams& getDisplayParams();
     void setDisplayParams(const DisplayParams& params);
@@ -170,8 +170,8 @@ public:
 protected:
     Window();
 
-    uint32_t     fWidth;
-    uint32_t     fHeight;
+    int          fWidth;
+    int          fHeight;
 
     OnCharFunc   fCharFunc;
     void*        fCharUserData;