Added -isMerge.

Author: joshaber

Classes/GTCommit.h

@@ -46,6 +46,9 @@
 @property (nonatomic, readonly) NSTimeZone *commitTimeZone;
 @property (nonatomic, readonly) GTTree *tree;
 
+/// Is this a merge commit?
+@property (nonatomic, readonly, assign, getter = isMerge) BOOL merge;
+
 /// The underlying `git_object` as a `git_commit` object.
 - (git_commit *)git_commit __attribute__((objc_returns_inner_pointer));
 

Classes/GTCommit.m

@@ -108,6 +108,10 @@ - (GTTree *)tree {
 	return (GTTree *)[GTObject objectWithObj:(git_object *)tree inRepository:self.repository];
 }
 
+- (BOOL)isMerge {
+	return git_commit_parentcount(self.git_commit) > 1;
+}
+
 - (NSArray *)parents {
 	unsigned numberOfParents = git_commit_parentcount(self.git_commit);
 	NSMutableArray *parents = [NSMutableArray arrayWithCapacity:numberOfParents];