iASL: Improve error messages for auto-disassembly

cleanup error messages when attempting to determine if an
input file is ASCII or binary (compile or disassemble).

source/common/acfileio.c

@@ -531,8 +531,6 @@ AcValidateTableHeader (
 
     if (!AcpiUtValidNameseg (TableHeader.Signature))
     {
-        fprintf (stderr, "Invalid table signature: 0x%8.8X\n",
-            *ACPI_CAST_PTR (UINT32, TableHeader.Signature));
         return (AE_BAD_SIGNATURE);
     }
 

source/compiler/aslascii.c

@@ -285,6 +285,9 @@ FlIsFileAsciiSource (
 
     if (BadBytes)
     {
+        fprintf (stderr,
+            "File appears to be binary: found %u non-ASCII characters, disassembling\n",
+            BadBytes);
         if (DisplayErrors)
         {
             AcpiOsPrintf (

source/compiler/aslstartup.c

@@ -316,6 +316,11 @@ AslDetectSourceFileType (
         Type = ASL_INPUT_TYPE_BINARY_ACPI_TABLE;
         goto Cleanup;
     }
+    else
+    {
+        fprintf (stderr,
+            "Binary file does not contain a valid ACPI table\n");
+    }
 
     Type = ASL_INPUT_TYPE_BINARY;