iASL: Remove extraneous error message if no parse tree created.

If early errors happen during the parsing stage, a parse tree
may not be created. An "internal" error was emitted. Add a check
for actual errors so that the internal error is only emitted
if no other errors were generated during the parse.

source/compiler/aslcompile.c

@@ -559,8 +559,17 @@ CmDoCompile (
 
     if (!RootNode)
     {
-        AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
-            NULL, "- Could not resolve parse tree root node");
+        /*
+         * If there are no errors, then we have some sort of
+         * internal problem.
+         */
+        Status = AslCheckForErrorExit ();
+        if (Status == AE_OK)
+        {
+            AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
+                NULL, "- Could not resolve parse tree root node");
+        }
+
         goto ErrorExit;
     }
 

source/compiler/aslcompiler.h

@@ -208,6 +208,11 @@ ACPI_STATUS
 AslDoOneFile (
     char                    *Filename);
 
+ACPI_STATUS
+AslCheckForErrorExit (
+    void);
+
+
 /*
  * aslcompile - compile mainline
  */

source/compiler/aslstartup.c

@@ -139,10 +139,6 @@ static UINT8
 AslDetectSourceFileType (
     ASL_FILE_INFO           *Info);
 
-static ACPI_STATUS
-AslCheckForErrorExit (
-    void);
-
 
 /*******************************************************************************
  *
@@ -630,7 +626,7 @@ AslDoOnePathname (
  *
  ******************************************************************************/
 
-static ACPI_STATUS
+ACPI_STATUS
 AslCheckForErrorExit (
     void)
 {