fix to handle bad stash output

My repository somehow got into a state where "git stash list" includes an extra line with just ":", causing an uncaught exception.

Author: David Catmull

Model/PBGitStash.m

@@ -19,6 +19,10 @@ @implementation PBGitStash
 	if ((self = [super init])) {
 		stashRawString = [stashLineFromStashListOutput retain];
 		NSArray *lineComponents = [stashLineFromStashListOutput componentsSeparatedByString:@":"];
+		if (lineComponents != 3) {
+			[self release];
+			return nil;
+		}
 		name = [[lineComponents objectAtIndex:0] retain];
 		stashSourceMessage = [[[lineComponents objectAtIndex:1] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] retain];
 		message = [[[lineComponents objectAtIndex:2] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] retain];

PBStashController.m

@@ -46,7 +46,8 @@ - (void) reload {
 		if ([stashLine length] == 0)
 			continue;
 		PBGitStash *stash = [[PBGitStash alloc] initWithRawStashLine:stashLine];
-		[loadedStashes addObject:stash];
+		if (stash != nil)
+			[loadedStashes addObject:stash];
 		[stash release];
 	}