Fix compilation error on Mac

ff735573 · peng xiao · e5c396bb · ff735573
Commit ff735573 authored Jul 16, 2013 by peng xiao
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perf_gftt.cpp modules/ocl/perf/perf_gftt.cpp +1 -1

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--- a/modules/ocl/perf/perf_gftt.cpp
+++ b/modules/ocl/perf/perf_gftt.cpp
@@ -58,7 +58,7 @@ PERFTEST(GoodFeaturesToTrack)
    
    std::vector<cv::Point2f> pts_gold, pts_ocl;

-    for(int imgIdx = 0; imgIdx < sizeof(images)/sizeof(std::string); ++imgIdx)
+    for(size_t imgIdx = 0; imgIdx < (sizeof(images)/sizeof(std::string)); ++imgIdx)
    {
        Mat frame = imread(abspath(images[imgIdx]), IMREAD_GRAYSCALE);
        CV_Assert(!frame.empty());