Mod: use unsigned when needed

modules/demux/mod.c

@@ -407,7 +407,7 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
         if( i_num_instruments )
         {
             i_temp_index = 0;
-            for( int i = 0; i < i_num_instruments && i_temp_index < sizeof(psz_temp); i++ )
+            for( unsigned i = 0; i < i_num_instruments && i_temp_index < sizeof(psz_temp); i++ )
             {
                 char lBuffer[33];
                 ModPlug_InstrumentName( p_sys->f, i, lBuffer );
@@ -419,7 +419,7 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
         }
 
         /* Make list of samples */
-        for( int i = 0; i < i_num_samples && i_temp_index < sizeof(psz_temp); i++ )
+        for( unsigned int i = 0; i < i_num_samples && i_temp_index < sizeof(psz_temp); i++ )
         {
             char psz_buffer[33];
             ModPlug_SampleName( p_sys->f, i, psz_buffer );