[PATCH] parsers: it should check the other interesting before decreasing ninteresting (issue3984)

[elson.wei at gmail.com]

# HG changeset patch
# User Wei, Elson <elson.wei at gmail.com>
# Date 1374744953 -28800
#      Thu Jul 25 17:35:53 2013 +0800
# Branch stable
# Node ID 024085d8dd13dcc4db48c7f99ed04c1ca5864597
# Parent  32e502b26983eaa89574835a024a9b035ad72bf4
parsers: it should check the other interesting before decreasing ninteresting (issue3984)

diff --git a/mercurial/parsers.c b/mercurial/parsers.c
--- a/mercurial/parsers.c
+++ b/mercurial/parsers.c
@@ -1359,10 +1359,10 @@
 				if (nsp == sp)
 					continue;
 				seen[p] = nsp;
+				interesting[sp] -= 1;
+				if (interesting[sp] == 0 && interesting[nsp] > 0)
+					ninteresting -= 1;
 				interesting[nsp] += 1;
-				interesting[sp] -= 1;
-				if (interesting[sp] == 0)
-					ninteresting -= 1;
 			}
 		}
 		interesting[sv] -= 1;
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