fix not-displaying submodules

Author: Scott Mckie

Controller/PBSubmoduleController.m

@@ -10,7 +10,13 @@
 #import "PBGitRepository.h"
 #import "PBOpenDocumentCommand.h"
 
+@interface PBSubmoduleController()
+@property (nonatomic, retain) NSArray *submodules;
+@end
+
+
 @implementation PBSubmoduleController
+@synthesize submodules;
 
 - (id) initWithRepository:(PBGitRepository *) repo {
     if ((self = [super init])){
@@ -50,7 +56,7 @@ - (void) reload {
             }
         }
 
-        submodules = loadedSubmodules;
+        self.submodules = loadedSubmodules;
     });
 }
 
@@ -114,7 +120,7 @@ - (BOOL) validateMenuItem:(NSMenuItem *)menuItem {
 		shouldBeEnabled = NO;
 		//TODO implementation missing
 	} else {
-		shouldBeEnabled = [submodules count] > 0;
+		shouldBeEnabled = [self.submodules count] > 0;
 	}
 	return shouldBeEnabled;
 }