Generate report failing to generate in some instances

[TylerMuhly]

Failed to generate a pdf or word report when selected all Sections for the 'Chilcotin caribou plan' area of interest
- generated a report when I selected:
- summary
- summary and forestry
- grizzly and forestry
- forestry
- didn't generate a report when I selected:
- caribou
- summary and caribou
- forestry and caribou
- forestry, grizzly, summary
- also had an error in generating ppt report when selecting summary

[KyleLochhead]

Getting this issue for .pdf report:

Quitting from lines 107-158 (./reports/summary.Rmd)
Quitting from lines 57-71 (./reports/summary.Rmd)
Warning: Error in : plot.data' contains value(s) < centre.y
[No stack trace available]