Fixed enum min/max values not properly escaped.
Fixed enum min/max values not properly escaped.

Change-Id: I503fbfaff1d2579807ca71a07cca8363dff75e52

alexames/flatbuffers,evolutional/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,pjulien/flatbuffers,pjulien/flatbuffers,google/flatbuffers,evolutional/flatbuffers,pjulien/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,DavadDi/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,pjulien/flatbuffers,pjulien/flatbuffers,google/flatbuffers,alexames/flatbuffers,pjulien/flatbuffers,google/flatbuffers,google/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,DavadDi/flatbuffers,google/flatbuffers,evolutional/flatbuffers,google/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,google/flatbuffers,alexames/flatbuffers,pjulien/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,alexames/flatbuffers,pjulien/flatbuffers,evolutional/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,google/flatbuffers,DavadDi/flatbuffers,DavadDi/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,google/flatbuffers,evolutional/flatbuffers,evolutional/flatbuffers,pjulien/flatbuffers,google/flatbuffers,alexames/flatbuffers,evolutional/flatbuffers,pjulien/flatbuffers,google/flatbuffers,google/flatbuffers,pjulien/flatbuffers,google/flatbuffers,pjulien/flatbuffers