git-p4: Fix regression in p4Where method.

Unfortunately, I introduced a bug in commit 7f705dc (git-p4: Fix bug in
p4Where method). This happens because sometimes the result from
"p4 where <somepath>" doesn't contain a "depotFile" key, but instead a
"data" key that needs further parsing. This commit should ensure that both
of these cases are checked.

Signed-off-by: Tor Arvid Lund <torarvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/fast-import/git-p4

@@ -249,9 +249,16 @@ def p4Where(depotPath):
     outputList = p4CmdList("where %s" % depotPath)
     output = None
     for entry in outputList:
-        if entry["depotFile"] == depotPath:
-            output = entry
-            break
+        if "depotFile" in entry:
+            if entry["depotFile"] == depotPath:
+                output = entry
+                break
+        elif "data" in entry:
+            data = entry.get("data")
+            space = data.find(" ")
+            if data[:space] == depotPath:
+                output = entry
+                break
     if output == None:
         return ""
     if output["code"] == "error":