[PATCH 2/3] Fix some "variable might be used uninitialized" warnings

In particular, gcc complains as follows:

        CC tree-walk.o
    tree-walk.c: In function `traverse_trees':
    tree-walk.c:347: warning: 'e' might be used uninitialized in this \
        function

        CC builtin/revert.o
    builtin/revert.c: In function `verify_opt_mutually_compatible':
    builtin/revert.c:113: warning: 'opt2' might be used uninitialized in \
        this function

Signed-off-by: Ramsay Jones <redacted>
---
 builtin/revert.c |    2 +-
 tree-walk.c      |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/builtin/revert.c b/builtin/revert.c
index 5f1cee8..30538a1 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c

@@ -110,7 +110,7 @@ static void verify_opt_compatible(const char *me, const char *base_opt, ...)
 
 static void verify_opt_mutually_compatible(const char *me, ...)
 {
-	const char *opt1, *opt2;
+	const char *opt1, *opt2 = NULL;
 	va_list ap;
 
 	va_start(ap, me);

diff --git a/tree-walk.c b/tree-walk.c
index 808bb55..a8d8a66 100644
--- a/tree-walk.c
+++ b/tree-walk.c

@@ -344,7 +344,7 @@ int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info)
 		unsigned long mask, dirmask;
 		const char *first = NULL;
 		int first_len = 0;
-		struct name_entry *e;
+		struct name_entry *e = NULL;
 		int len;
 
 		for (i = 0; i < n; i++) {

-- 
1.7.6