* spawn.cc (find_exec): Initialize err (CID 60111).

* strace.cc (strace::activate): Fix potential buffer overrun (CID 59938)
	* syscalls.cc (popen): Close parent pipe descriptor via fclosing fp on
	error to avoid resource leak (CID 59981).
	* thread.cc (pthread::exit): Avoid accessing cygtls member after
	deleting "this" (CID 60217).

winsup/cygwin/spawn.cc

@@ -94,7 +94,7 @@ find_exec (const char *name, path_conv& buf, const char *mywinenv,
   char *tmp = tp.c_get ();
   const char *posix = (opt & FE_NATIVE) ? NULL : name;
   bool has_slash = !!strpbrk (name, "/\\");
-  int err;
+  int err = 0;
 
   /* Check to see if file can be opened as is first.
      Win32 systems always check . first, but PATH may not be set up to