fixed 0.5.0 build for Windows

git-svn-id: http://find-object.googlecode.com/svn/trunk/find_object@358 620bd6b2-0a58-f614-fd9a-1bd335dccda9

example/main.cpp

@@ -155,7 +155,7 @@ int main(int argc, char * argv[])
 		sceneWidget.setData(sceneKeypoints, cvtCvMat2QImage(sceneImg));
 
 		// Find correspondences by NNDR (Nearest Neighbor Distance Ratio)
-		float nndrRatio = 0.8;
+		float nndrRatio = 0.8f;
 		std::vector<cv::Point2f> mpts_1, mpts_2; // Used for homography
 		std::vector<int> indexes_1, indexes_2; // Used for homography
 		std::vector<uchar> outlier_mask;  // Used for homography