Make the base class destructor of BCommandPipe::LineReader virtual, since

that will fix the problem fixed in r32926 for all derived classes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32957 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/shared/CommandPipe.h

@@ -63,6 +63,7 @@ public:
 
 			class LineReader {
 			public:
+				virtual				~LineReader() {}
 				virtual	bool		IsCanceled() = 0;
 				virtual	status_t	ReadLine(const BString& line) = 0;
 				// TODO: Add a Timeout() method.

src/kits/shared/CommandPipe.cpp

@@ -304,10 +304,6 @@ BCommandPipe::ReadLines(FILE* file)
 			fResult("")
 		{
 		}
-		
-		virtual ~AllLinesReader()
-		{
-		}
 
 		virtual bool IsCanceled()
 		{