Add D_fit_u_to_d()

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34077 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/display.h

@@ -7,6 +7,7 @@
 /* cnversions.c */
 void D_update_conversions(void);
 void D_fit_d_to_u(void);
+void D_fit_u_to_d(void);
 void D_show_conversions(void);
 
 void D_do_conversions(const struct Cell_head *, double, double, double, double);

lib/display/cnversions.c

@@ -118,6 +118,11 @@ void D_fit_d_to_u(void)
     fit_aspect(&D, &U);
 }
 
+void D_fit_u_to_d(void)
+{
+    fit_aspect(&U, &D);
+}
+
 void D_show_conversions(void)
 {
     fprintf(stderr,