Update math op block after fixing #198

Author: adazem009

src/blocks/operatorblocks.cpp

@@ -257,7 +257,7 @@ unsigned int OperatorBlocks::op_ln(VirtualMachine *vm)
     const Value &v = *vm->getInput(0, 1);
     if (v < 0)
         vm->replaceReturnValue(Value(Value::SpecialValue::NaN), 1);
-    else if (v == 0)
+    else if (v == 0 || v.isNaN())
         vm->replaceReturnValue(Value(Value::SpecialValue::NegativeInfinity), 1);
     else if (!v.isInfinity())
         vm->replaceReturnValue(std::log(v.toDouble()), 1);
@@ -269,7 +269,7 @@ unsigned int OperatorBlocks::op_log(VirtualMachine *vm)
     const Value &v = *vm->getInput(0, 1);
     if (v < 0)
         vm->replaceReturnValue(Value(Value::SpecialValue::NaN), 1);
-    else if (v == 0)
+    else if (v == 0 || v.isNaN())
         vm->replaceReturnValue(Value(Value::SpecialValue::NegativeInfinity), 1);
     else if (!v.isInfinity())
         vm->replaceReturnValue(std::log10(v.toDouble()), 1);