Git versions of glib, goffice, gnumeric, libgsf and libxml2.

Test case: http://jutaky.com/fuzzing/gnumeric_case_002-gog-grid-line.c.621.xls

$ ssconvert gnumeric_case_002-gog-grid-line.c.621.xls /tmp/out.xls

==25406==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000028 (pc 0x7fa253bba04d bp 0x7fffb3728f70 sp 0x7fffb3728480 T0)
    #0 0x7fa253bba04c in gog_grid_line_radial_render gnumeric/goffice/goffice/graph/gog-grid-line.c:621:23
    #1 0x7fa253ba87e7 in gog_grid_line_view_render gnumeric/goffice/goffice/graph/gog-grid-line.c:884:6
    #2 0x7fa253ba8c98 in gog_grid_line_view_render_lines gnumeric/goffice/goffice/graph/gog-grid-line.c:913:2
    #3 0x7fa253a50385 in grid_line_render gnumeric/goffice/goffice/graph/gog-chart.c:1518:3
    #4 0x7fa253a4c574 in gog_chart_view_render gnumeric/goffice/goffice/graph/gog-chart.c:1576:5
    #5 0x7fa253a09a58 in gog_view_render gnumeric/goffice/goffice/graph/gog-view.c:897:3
    #6 0x7fa253a3232b in gog_graph_view_render gnumeric/goffice/goffice/graph/gog-graph.c:1026:3
    #7 0x7fa253a09910 in gog_view_render gnumeric/goffice/goffice/graph/gog-view.c:892:3
    #8 0x7fa253cb2649 in gog_renderer_update gnumeric/goffice/goffice/graph/gog-renderer.c:1429:3
    #9 0x7fa22ee7fc9d in ms_excel_chart_write gnumeric/gnumeric/plugins/excel/ms-chart.c:5596:2
    #10 0x7fa22edc349b in excel_write_chart_v8 gnumeric/gnumeric/plugins/excel/ms-excel-write.c:4355:2
    #11 0x7fa22edbda88 in excel_write_obj_v8 gnumeric/gnumeric/plugins/excel/ms-excel-write.c:5041:10
    #12 0x7fa22ed9d7b9 in excel_write_objs_v8 gnumeric/gnumeric/plugins/excel/ms-excel-write.c:5612:10
    #13 0x7fa22ed93366 in excel_write_sheet gnumeric/gnumeric/plugins/excel/ms-excel-write.c:5700:3
    #14 0x7fa22ed60961 in excel_write_workbook gnumeric/gnumeric/plugins/excel/ms-excel-write.c:6536:3
    #15 0x7fa22ed61399 in excel_write_v8 gnumeric/gnumeric/plugins/excel/ms-excel-write.c:6589:3
    #16 0x7fa22ec39d61 in excel_save gnumeric/gnumeric/plugins/excel/boot.c:304:3
    #17 0x7fa22ec3a7bc in excel_biff8_file_save gnumeric/gnumeric/plugins/excel/boot.c:350:2
    #18 0x7fa25389045a in go_plugin_loader_module_func_file_save gnumeric/goffice/goffice/app/go-plugin-loader-module.c:366:2
    #19 0x7fa25389fcc1 in go_plugin_file_saver_save gnumeric/goffice/goffice/app/go-plugin-service.c:948:2
    #20 0x7fa2538b9d24 in go_file_saver_save gnumeric/goffice/goffice/app/file.c:848:2
    #21 0x7fa255237473 in wbv_save_to_output gnumeric/gnumeric/src/workbook-view.c:1059:2
    #22 0x7fa255237eff in wb_view_save_to_uri gnumeric/gnumeric/src/workbook-view.c:1093:3
    #23 0x7fa2552396e3 in wb_view_save_as gnumeric/gnumeric/src/workbook-view.c:1129:2
    #24 0x4e2afc in convert gnumeric/gnumeric/src/ssconvert.c:837:9
    #25 0x4ded93 in main gnumeric/gnumeric/src/ssconvert.c:913:9
    #26 0x7fa24dcca78f in __libc_start_main (/usr/lib/libc.so.6+0x2078f)
    #27 0x437c58 in _start (apps/bin/ssconvert+0x437c58)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV gnumeric/goffice/goffice/graph/gog-grid-line.c:621 gog_grid_line_radial_render

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Juha Kylmänen