[GR-4099] Various grid and ggplot2 related fixes.

...c/com/oracle/truffle/r/library/fastrGrid/GridContext.java

...fle/r/library/fastrGrid/grDevices/InitWindowedDevice.java

...le/r/library/fastrGrid/graphics/RGridGraphicsAdapter.java

...src/com/oracle/truffle/r/library/stats/CompleteCases.java

.../oracle/truffle/r/nodes/builtin/base/IsTypeFunctions.java

...tin/src/com/oracle/truffle/r/nodes/builtin/base/Prod.java

...es/src/com/oracle/truffle/r/nodes/function/RCallNode.java

...fle.r.runtime/src/com/oracle/truffle/r/runtime/RType.java

...est/src/com/oracle/truffle/r/test/ExpectedTestOutput.test

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_get.java

.../oracle/truffle/r/test/builtins/TestBuiltin_inherits.java

.../oracle/truffle/r/test/builtins/TestBuiltin_isvector.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_prod.java

...ffle/r/test/library/stats/TestExternal_completecases.java