Updated peek() function

Replaced if else conditionals with try except suite in order to catch IndexErrors if self.heap[1] is attempting to subscript and index out of bounds.

In response to issue joeyajames#108.

MaxHeap.py

@@ -15,9 +15,9 @@ def push(self, data):
 		self.__floatUp(len(self.heap) - 1)
 
 	def peek(self):
-		if self.heap[1]:
+		try:
 			return self.heap[1]
-		else:
+		except IndexError:
 			return False
 
 	def pop(self):
@@ -57,4 +57,4 @@ def __bubbleDown(self, index):
 m = MaxHeap([95, 3, 21])
 m.push(10)
 print(str(m.heap[0:len(m.heap)]))
-print(str(m.pop()))
+print(str(m.pop()))