FDS Source: add units of kg/kg for SURFACE OXYGEN MASS FRACTION output quantity

Author: ericvmueller

Source/data.f90

@@ -1595,7 +1595,7 @@ SUBROUTINE DEFINE_OUTPUT_QUANTITIES
 OUTPUT_QUANTITY(-77)%SHORT_NAME= '1=N,2=F,3=I,4=R'
 
 OUTPUT_QUANTITY(-78)%NAME = 'SURFACE OXYGEN MASS FRACTION'
-OUTPUT_QUANTITY(-78)%UNITS= ''
+OUTPUT_QUANTITY(-78)%UNITS= 'kg/kg'
 OUTPUT_QUANTITY(-78)%SHORT_NAME = 'Y_O2_F'
 OUTPUT_QUANTITY(-78)%BNDF_APPROPRIATE = .TRUE.