fixed font for dot diagrams

Author: dev-zero

Doxyfile

@@ -1592,12 +1592,12 @@ DOT_NUM_THREADS        = 0
 # DOTFONTPATH environment variable or by setting DOT_FONTPATH to the directory 
 # containing the font.
 
-DOT_FONTNAME           = Helvetica
+DOT_FONTNAME           = Liberation Sans
 
 # The DOT_FONTSIZE tag can be used to set the size of the font of dot graphs. 
 # The default size is 10pt.
 
-DOT_FONTSIZE           = 10
+DOT_FONTSIZE           = 8
 
 # By default doxygen will tell dot to use the output directory to look for the 
 # FreeSans.ttf font (which doxygen will put there itself). If you specify a