Merge pull request #321 from WeatherGod/fix_dep_warning

Missed a version check for get_facecolor(). Closes #316

Author: WeatherGod

lib/mpl_toolkits/basemap/__init__.py

@@ -1749,7 +1749,7 @@ def fillcontinents(self,color='0.8',lake_color=None,ax=None,zorder=None,alpha=No
         # get current axes instance (if none specified).
         ax = ax or self._check_ax()
         # get axis background color.
-        if _matplotlib_version >= '1.5':
+        if _matplotlib_version >= '2.0':
             axisbgc = ax.get_facecolor()
         else:
             axisbgc = ax.get_axis_bgcolor()