Bug #1251

- #1251 tests should sanitize TASKDATA and TASKRC env vars (thanks to Jakub
  Wilk).

test/util.t.cpp

@@ -27,6 +27,7 @@
 
 #include <cmake.h>
 #include <iostream>
+#include <stdlib.h>
 #include <main.h>
 #include <util.h>
 #include <test.h>
@@ -38,6 +39,10 @@ int main (int argc, char** argv)
 {
   UnitTest t (40);
 
+  // Ensure environment has no influence.
+  unsetenv ("TASKDATA");
+  unsetenv ("TASKRC");
+
   // TODO bool confirm (const std::string&);
   // TODO int confirm3 (const std::string&);
   // TODO int confirm4 (const std::string&);