Fix infinite loop in tex file handling in etags

[Masatake YAMATO]

Could someone install this patch, too?

2006-08-07  Masatake YAMATO  <address@hidden>

        * etags.c (TEX_mode): Check getc retruns EOF.
        File ended without newline causes infinite loop.

--- orig/lib-src/etags.c
+++ mod/lib-src/etags.c
@@ -5198,7 +5198,7 @@
     {
       /* Skip to next line if we hit the TeX comment char. */
       if (c == '%')
-       while (c != '\n')
+       while (c != '\n' && c != EOF)
          c = getc (inf);
       else if (c == TEX_LESC || c == TEX_SESC )
        break;