File CVE-2019-14274.patch of Package mcpp

Subject: [PATCH] Merge bug fixes from https://github.com/h8liu/mcpp.git

--- a/src/support.c
+++ b/src/support.c
@@ -188,7 +188,7 @@ static char *   append_to_buffer(
     size_t      length
 )
 {
-    if (mem_buf_p->bytes_avail < length) {  /* Need to allocate more memory */
+    if (mem_buf_p->bytes_avail < length + 1) {  /* Need to allocate more memory */
         size_t size = MAX( BUF_INCR_SIZE, length);
 
         if (mem_buf_p->buffer == NULL) {            /* 1st append   */
@@ -1722,6 +1722,8 @@ static char *   parse_line( void)
                     sp -= 2;
                     while (*sp != '\n')     /* Until end of line    */
                         mcpp_fputc( *sp++, OUT);
+                    mcpp_fputc('\n', OUT);
+                    wrong_line = TRUE;
                 }
                 goto  end_line;
             default:                        /* Not a comment        */
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