Add descriptor to exception in Type#getTypeInternal

Add the incorrect descriptor to the exception for ease of debugging

asm/src/main/java/org/objectweb/asm/Type.java

@@ -440,7 +440,7 @@ public final class Type {
       case '(':
         return new Type(METHOD, descriptorBuffer, descriptorBegin, descriptorEnd);
       default:
-        throw new IllegalArgumentException();
+        throw new IllegalArgumentException("Invalid descriptor: " + descriptorBuffer);
     }
   }