Fixed format exception when adding a reference to a COM library that has version numbers which are characters rather than numbers.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.0@1200 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Base/Project/Src/Project/Items/TypeLibrary.cs

@@ -66,7 +66,7 @@ namespace ICSharpCode.SharpDevelop.Project
 				}
 				string[] ver = version.Split('.');
 				
-				return ver.Length == 0 ? -1 : Int32.Parse(ver[0]);
+				return ver.Length == 0 ? -1 : GetVersion(ver[0]);
 			}
 		}
 		
@@ -77,7 +77,7 @@ namespace ICSharpCode.SharpDevelop.Project
 				}
 				string[] ver = version.Split('.');
 				
-				return ver.Length < 2 ? -1 : Int32.Parse(ver[1]);
+				return ver.Length < 2 ? -1 : GetVersion(ver[1]);
 			}
 		}
 		
@@ -146,5 +146,14 @@ namespace ICSharpCode.SharpDevelop.Project
 			}
 			return null;
 		}
+		
+		static int GetVersion(string s)
+		{
+			int version;
+			if (Int32.TryParse(s, out version)) {
+				return version;
+			}
+			return -1;
+		}
 	}
 }