calib3d: uninitialzed fields in usac

modules/calib3d/src/usac.hpp

@@ -421,7 +421,7 @@ struct SPRT_history {
     double epsilon, delta, A;
     // number of samples processed by test
     int tested_samples; // k
-    SPRT_history () {
+    SPRT_history () : epsilon(0), delta(0), A(0) {
         tested_samples = 0;
     }
 };