Bug-fix in osi_common

Signed-off-by: @lukas.elster <lukas.elster@tu-darmstadt.de>

Author: LukasElster

osi_common.proto

@@ -516,4 +516,4 @@ message WavelengthData
     // \note This defines the number of wavelengths to be computed during simulation, not to be confused with samples_per_pixel.
     //
     optional double samples_number = 3;
-}
+}