Use scaled integer array (ifld) in OpenJPEG version of enc_jpeg2000 #462

Job	Run time
Linux_options (aec_off png_off jasper_off openjpeg_off, -DUSE_AEC=OFF -DUSE_PNG=OFF -DUSE_Jasper=...	54s
Linux_options (aec_on png_off jasper_off openjpeg_off, -DUSE_AEC=ON -DUSE_PNG=OFF -DUSE_Jasper=OF...	55s
Linux_options (aec_off png_on jasper_off openjpeg_off, -DUSE_AEC=OFF -DUSE_PNG=ON -DUSE_Jasper=O...	1m 17s
Linux_options (aec_off png_off jasper_on openjpeg_off, -DUSE_AEC=OFF -DUSE_PNG=OFF -DUSE_Jasper=O...	54s
Linux_options (aec_off png_on jasper_on openjpeg_off, -DUSE_AEC=OFF -DUSE_PNG=ON -DUSE_Jasper=ON...	1m 31s
Linux_options (aec_on png_on jasper_on openjpeg_off, -DUSE_AEC=ON -DUSE_PNG=ON -DUSE_Jasper=ON ...	51s
Linux_options (aec_off png_off jasper_off openjpeg_on, -DUSE_AEC=OFF -DUSE_PNG=OFF -DUSE_Jasper=O...	1m 1s
Linux_options (aec_on png_off jasper_off openjpeg_on, -DUSE_AEC=ON -DUSE_PNG=OFF -DUSE_Jasper=OFF...	56s
Linux_options (aec_off png_on jasper_off openjpeg_on, -DUSE_AEC=OFF -DUSE_PNG=ON -DUSE_Jasper=OF...	56s
Linux_options (aec_on png_on jasper_off openjpeg_on, -DUSE_AEC=ON -DUSE_PNG=ON -DUSE_Jasper=OFF ...	55s
Linux_options (aec_off png_off jasper_off openjpeg_on, -DUSE_AEC=OFF -DUSE_PNG=OFF -DUSE_Jasper=O...	53s
Linux_options (aec_on png_on jasper_off openjpeg_on, -DUSE_AEC=ON -DUSE_PNG=ON -DUSE_Jasper=OFF ...	51s
Linux_options (g2c, -DBUILD_G2C=ON -DPTHREADS=OFF -DLOGGING=ON -DJasper_ROOT=~/Jasper)	1m 9s
Linux_options (g2c_pthreads, -DBUILD_G2C=ON -DPTHREADS=ON -DLOGGING=ON -DJasper_ROOT=~/Jasper)	1m 3s
Linux_options (shared, -DBUILD_SHARED_LIBS=ON)	49s
	14m 55s

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