fixed memory leak.

@@ -61,6 +61,11 @@
 }
 
 - (void)dealloc {
+    self.centerLatitude = nil;
+    self.centerLongitude = nil;
+    self.zoomLevel = nil;
+    self.minZoom = nil;
+    self.maxZoom = nil;    
     [super dealloc];
 }
 

@@ -50,6 +50,8 @@
 }
 
 - (void)dealloc {
+    self.infoTextView = nil; 
+    self.mapView = nil; 
     [super dealloc];
 }
 

@@ -21,6 +21,7 @@
 
 
 - (void)dealloc {
+    self.mapContents = nil;
     [rootViewController release];
     [window release];
     [super dealloc];