Fix bug 2458 also in 1.4.x.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_4_X@17439 a592a061-630c-0410-9148-cb99ea01b6c8

src/insets/insetgraphicsParams.C

@@ -66,7 +66,7 @@ void InsetGraphicsParams::init()
 	filename.erase();
 	lyxscale = 100;			// lyx scaling in percentage
 	display = lyx::graphics::DefaultDisplay; // display mode; see preferences
-	scale = string();			// output scaling in percentage
+	scale = string("100");			// output scaling in percentage
 	width = LyXLength();
 	height = LyXLength();
 	keepAspectRatio = false;	// for LaTeX output

status.14x

@@ -45,6 +45,8 @@ What's new
 - Fix display of math root inset when the exponent contains large
   things (bug 3295).
 
+- Set a default image size value (bug 2458).
+
 * BUILD/INSTALLATION: