o Fixed some memory release issues

@@ -46,8 +46,7 @@
 
 - (void) dealloc 
 {
-	[sublayers release];
-	sublayers = nil;
+	[sublayers release]; sublayers = nil;
 	mapContents = nil;
 	[super dealloc];
 }

@@ -53,7 +53,7 @@
 
 - (void)dealloc
 {
-	[cache release];
+	[cache release]; cache = nil;
 	[super dealloc];
 }
 

@@ -83,8 +83,8 @@
 @property (nonatomic, assign) RMProjectedPoint projectedLocation;
 @property (assign) BOOL enableDragging;
 @property (assign) BOOL enableRotation;
-@property (readwrite, assign) UIColor *lineColor;
-@property (readwrite, assign) UIColor *fillColor;
+@property (readwrite, retain) UIColor *lineColor;
+@property (readwrite, retain) UIColor *fillColor;
 
 - (void)moveToXY:(RMProjectedPoint)point;
 - (void)moveToScreenPoint:(CGPoint)point;

@@ -79,10 +79,10 @@
 
 - (void)dealloc
 {
-	CGPathRelease(path);
-    [self setLineColor:nil];
-    [self setFillColor:nil];
-	[super dealloc];
+    CGPathRelease(path); path = NULL;
+    [lineColor release]; lineColor = nil;
+    [fillColor release]; fillColor = nil;
+    [super dealloc];
 }
 
 - (id <CAAction>)actionForKey:(NSString *)key