wxGUI: fix rendering in latlon when resolution is high

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@71163 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/core/render.py

@@ -1091,11 +1091,11 @@ class Map(object):
                         (region['w'])
                     continue
                 elif key == "e-w resol":
-                    grass_region += "e-w resol: %f; " % \
+                    grass_region += "e-w resol: %.10f; " % \
                         (region['ewres'])
                     continue
                 elif key == "n-s resol":
-                    grass_region += "n-s resol: %f; " % \
+                    grass_region += "n-s resol: %.10f; " % \
                         (region['nsres'])
                     continue
                 elif key == "cols":