Fix compiler warning w/ 32-bit MSVC builds

diff --git a/jmemnobs.c b/jmemnobs.c
index ac12afa51bb5f1e92d293b55213cc0c49aa2a858..9326d1960cc6fae1a0275b2624e09bbb82033e3c 100644 (file)
--- a/jmemnobs.c
+++ b/jmemnobs.c
@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1992-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2017, D. R. Commander.
+ * Copyright (C) 2017-2018, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -72,7 +72,7 @@ jpeg_mem_available (j_common_ptr cinfo, size_t min_bytes_needed,
                     size_t max_bytes_needed, size_t already_allocated)
 {
   if (cinfo->mem->max_memory_to_use) {
-    if (cinfo->mem->max_memory_to_use > already_allocated)
+    if ((size_t)cinfo->mem->max_memory_to_use > already_allocated)
       return cinfo->mem->max_memory_to_use - already_allocated;
     else
       return 0;