Fix build.py to not break if someone passes in a config file name with '.cfg'

already on it. (Closes #839) Thanks for the suggestion / patch TJCRI! 


git-svn-id: http://svn.openlayers.org/trunk/openlayers@4099 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

build/build.py

@@ -10,7 +10,12 @@ configFilename = "library.cfg"
 outputFilename = "OpenLayers.js"
 
 if len(sys.argv) > 1:
-    configFilename = sys.argv[1] + ".cfg"
+    configFilename = sys.argv[1]
+    extension = configFilename[-4:]
+
+    if extension  != ".cfg":
+        configFilename = sys.argv[1] + ".cfg"
+
 if len(sys.argv) > 2:
     outputFilename = sys.argv[2]