Fix memory leak of lname variable in get_target_name()

Detected by cppcheck.
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>

tc/m_ipt.c

@@ -281,6 +281,7 @@ get_target_name(const char *name)
 			fputs(dlerror(), stderr);
 			printf("\n");
 			free(new_name);
+			free(lname);
 			return NULL;
 		}
 	}
@@ -297,6 +298,7 @@ get_target_name(const char *name)
 					fprintf(stderr, "\n");
 					dlclose(handle);
 					free(new_name);
+					free(lname);
 					return NULL;
 				}
 			}
@@ -304,6 +306,7 @@ get_target_name(const char *name)
 	}
 
 	free(new_name);
+	free(lname);
 	return m;
 }