Move declarations closer to usage.

Aaru.Compression/TeleDiskLzh.cs

@@ -169,12 +169,12 @@ public class TeleDiskLzh
     /// <returns>Number of decompressed bytes</returns>
     public int Decode(out byte[] buf, int len) /* Decoding/Uncompressing */
     {
-        short c;
         buf = new byte[len];
         int count; // was an unsigned long, seems unnecessary
 
         for(count = 0; count < len;)
         {
+            short c;
             if(_tdctl.Bufcnt == 0)
             {
                 if((c = DecodeChar()) < 0)

Aaru.Images/ByteAddressable/NES.cs

@@ -712,12 +712,11 @@ public class Nes : IByteAddressableImage
         var foundMapper    = false;
         var foundSubMapper = false;
 
-        Regex regex;
-        Match match;
-
         // Sanitize
         foreach(LinearMemoryDevice map in mappings.Devices)
         {
+            Regex regex;
+            Match match;
             switch(map.Type)
             {
                 case LinearMemoryType.ROM when !foundRom:

Aaru/Commands/Image/Decode.cs

@@ -184,7 +184,6 @@ sealed class DecodeCommand : Command
         Statistics.AddMediaFormat(inputFormat.Format);
         Statistics.AddMedia(inputFormat.Info.MediaType, false);
         Statistics.AddFilter(inputFilter.Name);
-        ErrorNumber errno;
 
         if(diskTags)
         {
@@ -194,6 +193,7 @@ sealed class DecodeCommand : Command
             {
                 foreach(MediaTagType tag in inputFormat.Info.ReadableMediaTags)
                 {
+                    ErrorNumber errno;
                     switch(tag)
                     {
                         case MediaTagType.SCSI_INQUIRY: