Added try catch block to catch runtime errors thrown from matching algorithms

[SVN r15374]

example/jgrep/jgrep.cpp

@@ -90,6 +90,7 @@ bool ogrep_predicate<iterator, Allocator>::operator()(const boost::match_results
 
 void process_grep(const char* file)
 {
+   try{
    using namespace boost;
    mapfile f(file);
    unsigned int count = 0;
@@ -119,6 +120,14 @@ void process_grep(const char* file)
       }
    }
    }
+   catch(const std::exception& e)
+   {
+      std::cerr << std::endl << e.what() << std::endl;
+   }
+   catch(...)
+   {
+   }
+}