Little fix to solve memory issues when parsing large json.

NSScanner+BSJSONAdditions.m

@@ -63,14 +63,31 @@ - (BOOL)scanJSONObject:(NSDictionary **)dictionary
 		NSString *key = nil;
 		id value;
 		[self scanJSONWhiteSpace];
+
+		// add an autorelease pool to fix memory issues
+		NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];	
+
+		int counter = 0;
 		while (([self scanJSONString:&key]) && ([self scanJSONKeyValueSeparator]) && ([self scanJSONValue:&value])) {
 			[jsonKeyValues setObject:value forKey:key];
 			[self scanJSONWhiteSpace];
+
+			//release the pool once every 500 iterations (500 is just a wild guess, should do more tests to find out the best value)
+			if (counter%500==0) {
+				[pool drain];
+				pool = [[NSAutoreleasePool alloc] init];	
+			}
+			counter++;
+
 			// check to see if the character at scan location is a value separator. If it is, do nothing.
 			if ([[[self string] substringWithRange:NSMakeRange([self scanLocation], 1)] isEqualToString:jsonValueSeparatorString]) {
 				[self scanJSONValueSeparator];
 			}
+
 		}
+		//always release the pool at the end of the loop
+		[pool drain];
+
 		if ([self scanJSONObjectEndString]) {
 			// whether or not we found a key-val pair, we found open and close brackets - completing an object
 			result = YES;