(syms_of_xdisp): Default underline-minimum-offset to 1.

src/ChangeLog

+2008-06-14  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	* xdisp.c (syms_of_xdisp): Default underline-minimum-offset to 1.
+
 2008-06-13  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* process.c (Fserial_process_configure, Fprocess_send_eof):

src/xdisp.c

@@ -24814,8 +24814,8 @@ margin to the caracter height.  */);
 This can improve legibility of underlined text at small font sizes,
 particularly when using variable `x-use-underline-position-properties'
 with fonts that specify an UNDERLINE_POSITION relatively close to the
-baseline.  The default value is 0.  */);
-  underline_minimum_offset = 0;
+baseline.  The default value is 1.  */);
+  underline_minimum_offset = 1;
 }