Fix const char* assignment to char*.

git-svn-id: http://root.cern.ch/svn/root/trunk@24854 27541ba8-7e3a-0410-8455-c3a389f83636

cint/test/ostream.cxx

@@ -34,7 +34,7 @@ int main()
 {
 	char c='a';
 	unsigned short b=255;
-	char *pc="hijklmn";
+	const char *pc="hijklmn";
 	//unsigned char *pb=(unsigned char*)255;
 
 	short s=0xffff;