Update impeller/entity/contents/text_contents.h

Co-authored-by: Brandon DeRosier <x@bdero.me>

Author: dnfield

impeller/entity/contents/text_contents.h

@@ -57,7 +57,7 @@ class TextContents final : public Contents {
 
  private:
   TextFrame frame_;
-  Scalar scale_;
+  Scalar scale_ = 1.0;
   Color color_;
   Scalar inherited_opacity_ = 1.0;
   Vector2 offset_;