Fix incorrect handling of compiler option environment variables

Author: dmiller

Clojure/Clojure/CljCompiler/Compiler.cs

@@ -222,15 +222,15 @@ static void InitializeCompilerOptions()
 					// compiler options on *nix need to be of the form
 					// CLOJURE_COMPILER_DIRECT_LINKING because most shells do not
 					// support hyphens in variable names
-					string optionName = name.Substring(1 + nixPrefix.Length).Replace("_", "-").ToLower();
+					string optionName = name.Substring(nixPrefix.Length).Replace("_", "-").ToLower();
                     compilerOptions = RT.assoc(compilerOptions,
                         RT.keyword(null, optionName),
                         RT.readString(v));
                 }
 				if ( name.StartsWith(winPrefix))
                 {
                     compilerOptions = RT.assoc(compilerOptions,
-                        RT.keyword(null, name.Substring(1 + winPrefix.Length)),
+                        RT.keyword(null, name.Substring(winPrefix.Length)),
                         RT.readString(v));
                 }