Don't consider query blank if URL params given.

This allows searching by, for example, WOEID with Yahoo PlaceFinder.

lib/geocoder/query.rb

@@ -37,10 +37,14 @@ module Geocoder
     end
 
     ##
-    # Is the Query text blank? (ie, should we not bother searching?)
+    # Is the Query blank? (ie, should we not bother searching?)
+    # A query is considered blank if its text is nil or empty string AND
+    # no URL parameters are specified.
     #
     def blank?
-      !!text.to_s.match(/^\s*$/)
+      !!text.to_s.match(/^\s*$/) and (
+        !options[:params].is_a?(Hash) or options[:params].keys.size == 0
+      )
     end
 
     ##

test/query_test.rb

@@ -18,6 +18,9 @@ class QueryTest < Test::Unit::TestCase
     assert Geocoder::Query.new("\t  ").blank?
     assert !Geocoder::Query.new("a").blank?
     assert !Geocoder::Query.new("Москва").blank? # no ASCII characters
+
+    assert Geocoder::Query.new(nil, :params => {}).blank?
+    assert !Geocoder::Query.new(nil, :params => {:woeid => 1234567}).blank?
   end
 
   def test_coordinates_detection