add warning if total parametric volume is less then 1

6 jobs for master in 8 minutes and 12 seconds (queued for 7 seconds)
latest
Status Name Job ID Coverage
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passed clang-c++11 #142698
Linux

00:04:33

passed clang-c++14 #142703
Linux

00:08:10

passed gcc-c++11 #142696
Linux

00:02:13

passed gcc-c++14 #142701
Linux

00:01:45

passed macos-c++11 #142704
Apple

00:04:59

passed macos-c++14 #142705
Apple

00:02:56