enable some warnings & fix 'em

Makefile.am

@@ -11,7 +11,7 @@ SSL_LIBS = @openssl_LIBS@
 
 RESOLV_LIBS = @RESOLV_LIBS@
 
-STROPHE_FLAGS = -I$(top_srcdir)
+STROPHE_FLAGS = -I$(top_srcdir) -Wall -Wextra -Werror -Wno-unused-parameter
 STROPHE_LIBS = libstrophe.la
 
 ## Main build targets

examples/vcard.c

@@ -131,7 +131,7 @@ static vcard_cb_t vcard_cb_get(xmpp_stanza_t *stanza)
 {
     vcard_cb_t cb = NULL;
     const char *tag;
-    int i;
+    size_t i;
 
     static struct {
         const char *tag;

src/stanza.c

@@ -431,7 +431,7 @@ int xmpp_stanza_to_text(xmpp_stanza_t *stanza,
     ret = _render_stanza_recursive(stanza, buffer, length);
     if (ret < 0) return ret;
 
-    if (ret > length - 1) {
+    if ((size_t)ret > length - 1) {
 	tmp = xmpp_realloc(stanza->ctx, buffer, ret + 1);
 	if (!tmp) {
 	    xmpp_free(stanza->ctx, buffer);
@@ -443,7 +443,7 @@ int xmpp_stanza_to_text(xmpp_stanza_t *stanza,
 	buffer = tmp;
 
 	ret = _render_stanza_recursive(stanza, buffer, length);
-	if (ret > length - 1) return XMPP_EMEM;
+	if ((size_t)ret > length - 1) return XMPP_EMEM;
     }
     
     buffer[length - 1] = 0;

tests/test_base64.c

@@ -134,8 +134,7 @@ int main(int argc, char *argv[])
     unsigned char *udec;
     char *dec;
     char *enc;
-    size_t len;
-    int i;
+    size_t len, i;
 
     printf("BASE64 tests.\n");
 

tests/test_string.c

@@ -79,7 +79,7 @@ static int test_strdup_one(xmpp_ctx_t *ctx, const char *s)
 static int test_strdup(void)
 {
     xmpp_ctx_t *ctx;
-    int i;
+    size_t i;
     int rc = 0;
 
     static const char *tests[] = { "", "\0", "test", "s p a c e", "\n\r" };