* fix warnings in mail

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38271 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/mail/WIndex.cpp

@@ -421,9 +421,8 @@ WIndex::NormalizeWord(const char *word, char *dest)
 	*dst = 0;
 
 	// convert to lower-case
-	dst = dest;
-	while (*dst)
-		*dst++ = tolower(*dst);
+	for (dst = dest; *dst; dst++)
+		*dst = tolower(*dst);
 	return dest;
 }
 

src/apps/mail/Words.cpp

@@ -498,7 +498,7 @@ word_match(const char* reference, const char* test)
 					s2++;
 				}
 				// Equivalent Character
-				else if (vsvfn[c1] == vsvfn[c2])
+				else if (vsvfn[(unsigned)c1] == vsvfn[(unsigned)c2])
 					x++;
 				// Unrelated Character
 				else