_exit(0) on clean shutdown, not _exit(1)

Test: m -j32 checkbuild
Bug: 36066697
Change-Id: Iaed45a86f9603badf26041212dfc5e9399bc0a0c
diff --git a/cmds/screencap/screencap.cpp b/cmds/screencap/screencap.cpp
index c4f17fa..e5c2466 100644
--- a/cmds/screencap/screencap.cpp
+++ b/cmds/screencap/screencap.cpp
@@ -216,5 +216,5 @@
     }
 
     // b/36066697: Avoid running static destructors.
-    _exit(1);
+    _exit(0);
 }