apply: get rid of useless x < 0 comparison on a size_t type

avar · gitster · commit 473f4c96e315 · 2011-11-06T10:36:59.000-08:00
According to the C standard size_t is always unsigned, therefore the
comparison "n1 &lt; 0 || n2 &lt; 0" when n1 and n2 are size_t will always be
false.

This was raised by clang 2.9 which throws this warning when compiling
apply.c:

    builtin/apply.c:253:9: warning: comparison of unsigned expression &lt; 0 is always false [-Wtautological-compare]
            if (n1 &lt; 0 || n2 &lt; 0)
                ~~ ^ ~
    builtin/apply.c:253:19: warning: comparison of unsigned expression &lt; 0 is always false [-Wtautological-compare]
            if (n1 &lt; 0 || n2 &lt; 0)
                          ~~ ^ ~

This check was originally added in v1.6.5-rc0~53^2 by Giuseppe Bilotta
while adding an option to git-apply to ignore whitespace differences.

Signed-off-by: Ævar Arnfjörð Bjarmason &lt;avarab@gmail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/builtin/apply.c b/builtin/apply.c
@@ -250,9 +250,6 @@ static int fuzzy_matchlines(const char *s1, size_t n1,
 	const char *last2 = s2 + n2 - 1;
 	int result = 0;
 
-	if (n1 < 0 || n2 < 0)
-		return 0;
-
 	/* ignore line endings */
 	while ((*last1 == '\r') || (*last1 == '\n'))
 		last1--;
