checkpatch: There is no qemu_strtod()

Maybe there should be; but until there is, we should not flag
strtod() calls as something to replaced with qemu_strtod().

We also lack qemu_strtof() and qemu_strtold(), but as no one
has been using strtof() or strtold(), it's not worth complicating
the regex for them.

(Ironically, I had to use 'git commit -n' since checkpatch uses
TAB indents, in violation of its own recommendations.)
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <1465526889-8339-3-git-send-email-eblake@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>

scripts/checkpatch.pl

@@ -2453,7 +2453,7 @@ sub process {
 		}
 
 # recommend qemu_strto* over strto* for numeric conversions
-		if ($line =~ /\b(strto[^k].*?)\s*\(/) {
+		if ($line =~ /\b(strto[^kd].*?)\s*\(/) {
 			WARN("consider using qemu_$1 in preference to $1\n" . $herecurr);
 		}
 # check for module_init(), use category-specific init macros explicitly please