[PATCH] libkmod: assign values to variables to fix warnings

[Shuo Wang <wangshuo47@huawei.com>]

	Dear Lucas,

Thanks for your reply. I was wondering if these changes will
 be merged in the future?

Best regards,
Shuo

>gcc version 7.3.0 (GCC)
>
>>what compiler?
>>>libkmod/libkmod.c: In function 'kmod_lookup_alias_is_builtin':
>>>./shared/util.h:73:9: warning: 'line' may be used uninitialized in this function [-Wmaybe-uninitialized]
>>>         free(*(void**) p);
>>>         ^~~~~~~~~~~~~~~~~
>>>libkmod/libkmod.c:581:23: note: 'line' was declared here
>>>  _cleanup_free_ char *line;
>>>                       ^~~~
>>>In file included from libkmod/libkmod-module.c:42:0:
>>>libkmod/libkmod-module.c: In function 'kmod_module_probe_insert_module':
>>>./shared/util.h:73:9: warning: 'cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
>>>         free(*(void**) p);
>>>         ^~~~~~~~~~~~~~~~~
>>>libkmod/libkmod-module.c:1009:23: note: 'cmd' was declared here
>>>  _cleanup_free_ char *cmd;
>>>
>>>---
>>> libkmod/libkmod-module.c | 2 +-
>>> libkmod/libkmod.c        | 2 +-
>>> 2 files changed, 2 insertions(+), 2 deletions(-)
>>>
>>>diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
>>>index 76a6dc3..2e973b5 100644
>>>--- a/libkmod/libkmod-module.c
>>>+++ b/libkmod/libkmod-module.c
>>>@@ -1006,7 +1006,7 @@ static int module_do_install_commands(struct kmod_module *mod,
>>> {
>>> 	const char *command = kmod_module_get_install_commands(mod);
>>> 	char *p;
>>>-	_cleanup_free_ char *cmd;
>>>+	_cleanup_free_ char *cmd = NULL;
>>> 	int err;
>>> 	size_t cmdlen, options_len, varlen;
>>> 
>>>diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
>>>index 43423d6..66e658c 100644
>>>--- a/libkmod/libkmod.c
>>>+++ b/libkmod/libkmod.c
>>>@@ -578,7 +578,7 @@ finish:
>>> 
>>> bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
>>> {
>>>-	_cleanup_free_ char *line;
>>>+	_cleanup_free_ char *line = NULL;
>>> 
>>> 	line = lookup_builtin_file(ctx, name);
>>> 
>>>-- 
>>>2.23.0