apply: mark unused parameters in handlers

In parse_git_diff_header(), we have a table-driven parser that maps
strings to handler functions. Not all handlers need all of the
parameters; let's mark the unused ones to appease -Wunused-parameter.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

apply.c

@@ -892,9 +892,9 @@ static int parse_traditional_patch(struct apply_state *state,
 	return 0;
 }
 
-static int gitdiff_hdrend(struct gitdiff_data *state,
-			  const char *line,
-			  struct patch *patch)
+static int gitdiff_hdrend(struct gitdiff_data *state UNUSED,
+			  const char *line UNUSED,
+			  struct patch *patch UNUSED)
 {
 	return 1;
 }
@@ -1044,7 +1044,7 @@ static int gitdiff_renamedst(struct gitdiff_data *state,
 	return 0;
 }
 
-static int gitdiff_similarity(struct gitdiff_data *state,
+static int gitdiff_similarity(struct gitdiff_data *state UNUSED,
 			      const char *line,
 			      struct patch *patch)
 {
@@ -1054,7 +1054,7 @@ static int gitdiff_similarity(struct gitdiff_data *state,
 	return 0;
 }
 
-static int gitdiff_dissimilarity(struct gitdiff_data *state,
+static int gitdiff_dissimilarity(struct gitdiff_data *state UNUSED,
 				 const char *line,
 				 struct patch *patch)
 {
@@ -1104,9 +1104,9 @@ static int gitdiff_index(struct gitdiff_data *state,
  * This is normal for a diff that doesn't change anything: we'll fall through
  * into the next diff. Tell the parser to break out.
  */
-static int gitdiff_unrecognized(struct gitdiff_data *state,
-				const char *line,
-				struct patch *patch)
+static int gitdiff_unrecognized(struct gitdiff_data *state UNUSED,
+				const char *line UNUSED,
+				struct patch *patch UNUSED)
 {
 	return 1;
 }