Fixed: Typo in function call to _CPDecimalSetZero and made the test case work properly (#2820)

Foundation/CPDecimal.j

@@ -941,7 +941,7 @@ function CPDecimalDivide(result, leftOperand, rightOperand, roundingMode)
 
         if (result._exponent + exp < CPDecimalMinExponent)
         {
-            CPDecimalSetZero(result);
+            _CPDecimalSetZero(result);
             return error;
         }
     }

Tests/Foundation/CPDecimalNumberTest.j

@@ -295,7 +295,12 @@
 
     try
     {
-        dcmn3 = [dcmn1 decimalNumberByDividingBy:dcmn2];
+        dcmn3 = [dcmn1 decimalNumberByDividingBy:dcmn2
+                                    withBehavior:[CPDecimalNumberHandler decimalNumberHandlerWithRoundingMode:CPRoundPlain scale:0
+                                                                                             raiseOnExactness:YES
+                                                                                              raiseOnOverflow:YES
+                                                                                             raiseOnUnderflow:YES
+                                                                                          raiseOnDivideByZero:YES]];
         [self fail:"decimalNumberByDividingBy: TEX3 - should have thrown underflow error "];
     }
     catch (e)