Fix minor compilation error using maven.
Fix minor compilation error using maven.

Reference to RealPoint is ambiguous, both method RealPoint(double...)
in net.imglib2.RealPoint and method RealPoint(float...) in
net.imglib2.RealPoint match.
Signed-off-by: Jean-Yves Tinevez <e56a6ee37544ca2467315a0f3163c8180fa84354@pasteur.fr>

bogovicj/bigdataviewer-core,bogovicj/bigdataviewer-core,bigdataviewer/bigdataviewer-core,bigdataviewer/bigdataviewer-core