fixed Ubuntu build

tools/StereoEval/io.h

@@ -9,6 +9,7 @@
 #define PFMREADER_H_
 
 #include <iostream>
+#include <stdio.h>
 #include <opencv2/opencv.hpp>
 
 // taken from http://vision.middlebury.edu/stereo/ evaluation tool

tools/StereoEval/main.cpp

@@ -177,7 +177,7 @@ int main(int argc, char * argv[])
 		// dymax=0.423
 		// ---
 		std::string calibFile = argv[3];
-		std::ifstream stream(calibFile);
+		std::ifstream stream(calibFile.c_str());
 		std::string line;
 
 		// two first lines are camera intrinsics