add a few more gcc warning flags and fix quite a few problems found by doing so

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pulsecore/idxset.c b/src/pulsecore/idxset.c
index fb4497b8..b6423efd 100644
--- a/src/pulsecore/idxset.c
+++ b/src/pulsecore/idxset.c
@@ -66,7 +66,7 @@ unsigned pa_idxset_string_hash_func(const void *p) {
     const char *c;
 
     for (c = p; *c; c++)
-        hash = 31 * hash + *c;
+        hash = 31 * hash + (unsigned) *c;
 
     return hash;
 }