Fixing inline equations size

Author: ocampana-videotec

doc/PTZ.xml

@@ -1503,12 +1503,12 @@ Add GeoMove</revremark>
           </para>
           <para>where <inlinemediaobject>
               <imageobject>
-                <imagedata fileref="equations/PTZ/f_0.svg" contentdepth="10mm"/>
+                <imagedata fileref="equations/PTZ/f_0.svg" contentdepth="5mm"/>
               </imageobject>
           </inlinemediaobject>
             is the minimum focal length and <inlinemediaobject>
               <imageobject>
-                <imagedata fileref="equations/PTZ/f_c.svg" contentdepth="10mm"/>
+                <imagedata fileref="equations/PTZ/f_c.svg" contentdepth="5mm"/>
               </imageobject>
             </inlinemediaobject> is the current focal length.</para>
           <para>The current angle of view can be calculated with the following formula:</para>