Fixed how ca65 handles some debug info from cc65.

ca65 used to claim that an assembler error/warning was found on a C code line; and, that an Assembly line is only indirectly related to it.
Now, ca65 says that the Assembly line has the problem; and, that the Assembly line was produced from the C line.

src/ca65/error.c

@@ -144,7 +144,7 @@ static void AddNotifications (const Collection* LineInfos)
                 break;
 
             case LI_TYPE_EXT:
-                Msg = "Assembler code generated from this line";
+                Msg = "Assembly code generated from this line";
                 break;
 
             case LI_TYPE_MACRO:

src/ca65/lineinfo.c

@@ -368,6 +368,14 @@ void NewAsmLine (void)
 
     /* Start a new line using the current line info */
     AsmLineInfo = StartLine (&CurTok.Pos, LI_TYPE_ASM, 0);
+
+    /* If the first LineInfo in the list came from a .dbg line, then we want
+    ** errors and warnings to show it as an additional note, not as the primary
+    ** line.  Therefore, swap the first two LineInfo items.
+    */
+    if (GetLineInfoType (CollAtUnchecked (&CurLineInfo, 0)) == LI_TYPE_EXT) {
+        CollMove (&CurLineInfo, 1, 0);
+    }
 }