Merge pull request #12477 from drjfloyd/master

FDS Source: change TGA to set B1%TMP_G instead of SF%TMP_FRONT

Source/wall.f90

@@ -1851,7 +1851,7 @@ SUBROUTINE SOLID_HEAT_TRANSFER_1D(NM,T,DT_BC,PARTICLE_INDEX,WALL_INDEX,CFACE_IND
    BACK_INDEX      = 0
    BACK_WALL_INDEX = BACK_INDEX
    BACK_MESH       = NM
-   IF (LPC%MASSLESS_TARGET .AND. SF%GEOMETRY==SURF_CARTESIAN) THEN
+   IF (LAGRANGIAN_PARTICLE_CLASS(LP%CLASS_INDEX)%MASSLESS_TARGET .AND. SF%GEOMETRY==SURF_CARTESIAN) THEN
       BACKING = VOID
    ELSE
       BACKING = INSULATED
@@ -3437,7 +3437,7 @@ SUBROUTINE TGA_ANALYSIS
 DO I=1,N_TGA
    IF (ONE_D%LAYER_THICKNESS(1)<TWO_EPSILON_EB) EXIT
    T_TGA = I*DT_TGA
-   SF%TMP_GAS_FRONT = TMPA + TGA_HEATING_RATE*T_TGA
+   B1%TMP_G = TMPA + TGA_HEATING_RATE*T_TGA
    IF (TGA_WALL_INDEX>0) THEN
       CALL SOLID_HEAT_TRANSFER_1D(1,T_TGA,DT_TGA,WALL_INDEX=IW)
    ELSE