Allow reading after child has exited.

git-svn-id: https://svn.microneil.com/svn/CodeDweller/branches/adeniz_1@99 d34b734f-a00e-4b39-a726-e4eeb87269ab

child.hpp

     template<typename T>
     size_t read(T &data, size_t nBytes = 0) {
 
-      if (!isRunning()) {
-        throw std::logic_error("No child process is running.");
+      if (!childStarted) {
+        throw std::logic_error("Child process was not started.");
       }
 
       data.clear();
     template<typename T, typename U>
     bool readDelimited(T &data, U const &delimiter) {
 
-      if (!isRunning()) {
-        throw std::logic_error("No child process is running.");
+      if (!childStarted) {
+        throw std::logic_error("Child process was not started.");
       }
 
       data.clear();
 
     }
 
-
     /** Non-blocking request to get data up to a delimiter read from
         the child.