Fixed most compiler warnings -Wall -Wextra

repro:
  CFLAGS="-Wall -Wextra -Wunused-parameter -Wc++-compat" ./configure && make

which we use for perl, and libyaml is now included in cperl.
Tested with gcc-5 and clang-3.7

There are still a tons of format warnings (%d on 64bit) in
example-deconstructor.c which I skipped.

1 files changed, 3 insertions, 5 deletions

diff --git a/src/scanner.c b/src/scanner.c
index 068dc13..b6f5185 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -1186,11 +1186,9 @@ yaml_parser_increase_flow_level(yaml_parser_t *parser)
 static int
 yaml_parser_decrease_flow_level(yaml_parser_t *parser)
 {
-    yaml_simple_key_t dummy_key;    /* Used to eliminate a compiler warning. */
-
     if (parser->flow_level) {
         parser->flow_level --;
-        dummy_key = POP(parser, parser->simple_keys);
+        (void)POP(parser, parser->simple_keys);
     }
 
     return 1;
@@ -2401,7 +2399,7 @@ yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token)
     {
         /* Set the handle to '' */
 
-        handle = yaml_malloc(1);
+        handle = YAML_MALLOC(1);
         if (!handle) goto error;
         handle[0] = '\0';
 
@@ -2453,7 +2451,7 @@ yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token)
             /* Set the handle to '!'. */
 
             yaml_free(handle);
-            handle = yaml_malloc(2);
+            handle = YAML_MALLOC(2);
             if (!handle) goto error;
             handle[0] = '!';
             handle[1] = '\0';