Update _variadicArgumentsToArray:args: method

Update method to have better pre-ARC memory management syntax (I think).

Author: mattrobmattrob

Source/OCMock/OCMockObject.m

@@ -451,25 +451,25 @@ - (NSString *)_stubDescriptions:(BOOL)onlyExpectations
 	return outputString;
 }
 
-+ (NSArray *)_variadicArgumentsToArray:(id)firstObject args:(va_list)args
++ (NSArray *)_variadicArgumentsToArray:(id)firstObject args:(va_list *)args
 {
     NSMutableArray *variadicObjects = nil;
 
     if(firstObject)
     {
-        variadicObjects = [[NSMutableArray alloc] init];
+        variadicObjects = [[[NSMutableArray alloc] init] autorelease];
         [variadicObjects addObject:firstObject];
 
-        if(args != nil)
+        if(args)
         {
             id eachObject;
-            while ((eachObject = va_arg(args, id)) && eachObject != nil) {
+            while ((eachObject = va_arg(*args, typeof(firstObject)))) {
                 [variadicObjects addObject:eachObject];
             }
         }
     }
 
-    return [variadicObjects copy];
+    return variadicObjects;
 }
 
 @end