fix http://community.sharpdevelop.net/forums/t/19403.aspx - MIME Type detection throws COM Exception on 2-byte (non-Unicode) files

src/Main/Base/Project/Src/Services/MimeTypeDetection.cs

@@ -53,6 +53,7 @@ namespace ICSharpCode.SharpDevelop
 							reader = new StreamReader(stream, Encoding.UTF8);
 							break;
 						} else {
+							stream.Position = 0;
 							byte[] buffer = new byte[BUFFER_SIZE];
 							int length = stream.Read(buffer, 0, BUFFER_SIZE);
 							return FindMimeType(buffer, 0, length);

src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj

@@ -204,5 +204,8 @@
     <EmbeddedResource Include="mime_utf-16_be_test.txt" />
     <EmbeddedResource Include="mime_utf-16_le_test.txt" />
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="mime_bug1.txt" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSHARP.Targets" />
 </Project>

src/Main/Base/Test/MimeDetectionTests.cs

@@ -54,6 +54,7 @@ namespace ICSharpCode.SharpDevelop.Tests
 		{
 			TestMime(LoadFile("ICSharpCode.SharpDevelop.Tests.mime_utf-16_be_test.txt"), "text/plain");
 			TestMime(LoadFile("ICSharpCode.SharpDevelop.Tests.mime_utf-16_le_test.txt"), "text/plain");
+			TestMime(LoadFile("ICSharpCode.SharpDevelop.Tests.mime_bug1.txt"), "text/plain");
 		}
 		
 		byte[] LoadFile(string resourceName)

src/Main/Base/Test/mime_bug1.txt

@@ -0,0 +1 @@
+1<EFBFBD>