[jsk_pcl_ros/octomap_server_contact_nodelet.cpp] fix memory leak of colors pointer

[Naoki-Hiraoka]

OctoMap/octomap_mapping#40 と同じmemory leakがありました。

このmemory leakはCOLOR_OCTOMAP_SERVERオプションが定義されているときのみ発生しますが、デフォルトでは定義されていないため、普通に使っている限りはこのPR無しでもmemory leakは発生しません。

[k-okada]

nice catch! can you check other memory leaks? ``` ***@***.***:~/catkin_ws/ws_recognition/src/jsk_recognition$ cppcheck -q . [checkerboard_detector/src/checkerboard_detector.cpp:525]: (error) Uninitialized variable: ncorners [cr_capture/src/CRLib.cpp:310]: (error) Mismatching allocation and deallocation: lu_ptr [cr_capture/src/CRLib.cpp:311]: (error) Mismatching allocation and deallocation: ru_ptr [cr_capture/src/CRLib.cpp:312]: (error) Mismatching allocation and deallocation: v_ptr [jsk_pcl_ros/src/color_histogram_matcher_nodelet.cpp:341]: (error) Uninitialized variable: val [jsk_pcl_ros/src/octomap_server_contact_nodelet.cpp:305]: (error) Memory leak: colors ``` -- ◉ Kei Okada 2022年1月12日(水) 9:41 iory ***@***.***>:

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