variable name changed for compatibilty

tests/util-test.cpp

@@ -17,14 +17,15 @@ Notes:       [Any relevant details, such as dependencies, usage examples, or kno
 #include "util.h"
 
 using namespace UTILITY_FUNCTIONS;
+using namespace std;
 
 //----------- Test of utility function 'max3' ---------
 // Magic numbers for simplicity ( exceptionally allowed here )
 
 // test if param 3 is max value
 TEST(UtilityTest_max3, param_3_is_max) {
-    double max = max3(1.0f, 2.0f, 3.0f);
-    EXPECT_DOUBLE_EQ(max, 3.0f);
+    double ma = max3(1.0f, 2.0f, 3.0f);
+    EXPECT_DOUBLE_EQ(ma, 3.0f);
 }
 
 // test if param 2 is max value