Fix float comparisons

Replace this "==" with a more tolerant comparison operation.
Floating point numbers should not be tested for equality cpp:S1244

AI/Nullkiller/Pathfinding/AINodeStorage.cpp

@@ -1265,8 +1265,8 @@ bool AINodeStorage::hasBetterChain(
 				&& nodeActor->heroFightingStrength >= candidateActor->heroFightingStrength
 				&& node.getCost() <= candidateNode->getCost())
 			{
-				if(nodeActor->heroFightingStrength == candidateActor->heroFightingStrength
-					&& node.getCost() == candidateNode->getCost()
+				if(vstd::isAlmostEqual(nodeActor->heroFightingStrength, candidateActor->heroFightingStrength)
+					&& vstd::isAlmostEqual(node.getCost(), candidateNode->getCost())
 					&& &node < candidateNode)
 				{
 					continue;

lib/json/JsonValidator.cpp

@@ -232,7 +232,7 @@ namespace
 		std::string multipleOfCheck(Validation::ValidationData & validator, const JsonNode & baseSchema, const JsonNode & schema, const JsonNode & data)
 		{
 			double result = data.Float() / schema.Float();
-			if (floor(result) != result)
+			if (!vstd::isAlmostEqual(floor(result), result))
 				return validator.makeErrorMessage((boost::format("Value is not divisible by %d") % schema.Float()).str());
 			return "";
 		}

lib/pathfinder/CGPathNode.h

@@ -102,7 +102,7 @@ struct DLL_LINKAGE CGPathNode
 	STRONG_INLINE
 	void setCost(float value)
 	{
-		if(value == cost)
+		if(vstd::isAlmostEqual(value, cost))
 			return;
 
 		bool getUpNode = value < cost;

lib/serializer/JsonSerializer.cpp

@@ -35,7 +35,7 @@ void JsonSerializer::serializeInternal(const std::string & fieldName, si32 & val
 
 void JsonSerializer::serializeInternal(const std::string & fieldName, double & value, const std::optional<double> & defaultValue)
 {
-	if(!defaultValue || defaultValue.value() != value)
+	if(!defaultValue || !vstd::isAlmostEqual(defaultValue.value(), value))
 		currentObject->operator[](fieldName).Float() = value;
 }