core/string: Realloc strings before returning

g_strchomp() modifies the string in place, but doesn't free up unused
memory at the end of the original string.

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

core/string.c

@@ -73,7 +73,7 @@ gchar *string_lowercase(const gchar *str)
 	*j = '\0';
 
 	g_strchomp(res);
-	return res;
+	return g_realloc(res, strlen(res) + 1);
 }
 
 int string_compare(const gchar *lhs, const gchar *rhs)