graphviz: check whether dlpi_name is NULL
At least on an Android O device I have, one of the dl_phdr_info objects passed to the callback of dl_iterate_phdr has NULL in its dlpi_name field.
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@ -0,0 +1,16 @@
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diff --git a/lib/gvc/gvconfig.c b/lib/gvc/gvconfig.c
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index 2d86321..ecb011b 100644
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--- a/lib/gvc/gvconfig.c
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+++ b/lib/gvc/gvconfig.c
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@@ -268,6 +268,11 @@ static void gvconfig_write_library_config(GVC_t *gvc, char *lib_path,
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static int line_callback(struct dl_phdr_info *info, size_t size, void *line)
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{
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const char *p = info->dlpi_name;
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+
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+ /* At least on an Android O device I have, this can happen */
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+ if (!p)
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+ return 0;
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+
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char *tmp = strstr(p, "/libgvc.");
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(void) size;
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if (tmp) {
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