fixed defects from coverity.com

modules/ts/src/ts_func.cpp

@@ -2897,7 +2897,7 @@ static std::ostream& operator << (std::ostream& out, const MatPart& m)
 }
 
 MatComparator::MatComparator(double _maxdiff, int _context)
-    : maxdiff(_maxdiff), context(_context) {}
+    : maxdiff(_maxdiff), realmaxdiff(DBL_MAX), context(_context) {}
 
 ::testing::AssertionResult
 MatComparator::operator()(const char* expr1, const char* expr2,

modules/ts/src/ts_perf.cpp

@@ -855,6 +855,9 @@ int64 TestBase::_calibrate()
 #endif
 TestBase::TestBase(): testStrategy(PERF_STRATEGY_DEFAULT), declare(this)
 {
+    lastTime = totalTime = timeLimit = 0;
+    nIters = currentIter = runsPerIteration = 0;
+    verified = false;
 }
 #ifdef _MSC_VER
 # pragma warning(pop)