git-p4: add gitConfigInt reader

Add a git config reader for integer variables. Please note that the
git config implementation automatically supports k, m, and g suffixes.

Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-p4.py

diff --git a/git-p4.py b/git-p4.py
index 206a45f..c99b077 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -623,6 +623,17 @@
         _gitConfig[key] = gitConfig(key, '--bool') == "true"
     return _gitConfig[key]
 
+def gitConfigInt(key):
+    if not _gitConfig.has_key(key):
+        cmd = [ "git", "config", "--int", key ]
+        s = read_pipe(cmd, ignore_error=True)
+        v = s.strip()
+        try:
+            _gitConfig[key] = int(gitConfig(key, '--int'))
+        except ValueError:
+            _gitConfig[key] = None
+    return _gitConfig[key]
+
 def gitConfigList(key):
     if not _gitConfig.has_key(key):
         s = read_pipe(["git", "config", "--get-all", key], ignore_error=True)