Fix two minor typos

std/IntIterator.hx

@@ -23,7 +23,7 @@
  /**
 	IntIterator is used for implementing interval iterations.
 
-	It is usually not used explicitly, but through it's special syntax:
+	It is usually not used explicitly, but through its special syntax:
 	`min...max`
 
 	While it is possible to assign an instance of IntIterator to a variable or

std/cs/internal/FieldLookup.hx

@@ -132,7 +132,7 @@ package cs.internal;
 				return fields[mid];
 			}
 		}
-		//if not found, it's definately an error
+		//if not found, it's definitely an error
 		throw "Field not found for hash " + key;
 	}