sitl_run.sh: use tabs, not spaces

Tools/sitl_run.sh

@@ -65,9 +65,9 @@ SIM_PID=0
 
 # Allow speed factor to bet set from environment.
 if [[ -n "$PX4_SIM_SPEED_FACTOR" ]]; then
-    speed_factor=$PX4_SIM_SPEED_FACTOR
+	speed_factor=$PX4_SIM_SPEED_FACTOR
 else
-    speed_factor=1
+	speed_factor=1
 fi
 
 if [ "$program" == "jmavsim" ] && [ ! -n "$no_sim" ]; then
@@ -116,7 +116,7 @@ export PX4_SIM_MODEL=${model}
 
 
 if [[ -n "$DONT_RUN" ]]; then
-    echo "Not running simulation (\$DONT_RUN is set)."
+	echo "Not running simulation (\$DONT_RUN is set)."
 elif [ "$debugger" == "lldb" ]; then
 	eval lldb -- $sitl_command
 elif [ "$debugger" == "gdb" ]; then