--- a/tools/libgfx.c	Wed May 30 13:20:40 2018 +0300
+++ b/tools/libgfx.c	Wed May 30 13:21:14 2018 +0300
@@ -1449,7 +1449,7 @@
     Uint32 id;
     Uint32 size;
     int count;
-    char str[6];
+    char idStr[6];
 } DMIFFChunk;
 
 
@@ -1507,18 +1507,16 @@
             "ILBM: Could not read IFF chunk header.\n");
     }
     else
+    {
+        chunk->idStr[0] = (chunk->id >> 24) & 0xff;
+        chunk->idStr[1] = (chunk->id >> 16) & 0xff;
+        chunk->idStr[2] = (chunk->id >> 8) & 0xff;
+        chunk->idStr[3] = (chunk->id) & 0xff;
+        chunk->idStr[4] = 0;
         return DMERR_OK;
+    }
 }
 
-static char * dmGetIFFChunkID(DMIFFChunk *chunk)
-{
-    chunk->str[0] = (chunk->id >> 24) & 0xff;
-    chunk->str[1] = (chunk->id >> 16) & 0xff;
-    chunk->str[2] = (chunk->id >> 8) & 0xff;
-    chunk->str[3] = (chunk->id) & 0xff;
-    chunk->str[4] = 0;
-    return chunk->str;
-}
 
 static int dmSkipIFFChunkRest(DMResource *fp, const DMIFFChunk *chunk, const Uint32 used)
 {
@@ -1539,6 +1537,7 @@
         return DMERR_OK;
 }
 
+
 static int dmCheckIFFChunk(DMIFFChunk *dest, DMIFFChunk *chunk,
     const BOOL multi, const Uint32 minSize)
 {
@@ -1546,7 +1545,7 @@
     {
         return dmError(DMERR_INVALID_DATA,
             "ILBM: Multiple instances of chunk %s found.\n",
-            dmGetIFFChunkID(chunk));
+            chunk->idStr);
     }
 
     dest->count++;
@@ -1918,7 +1917,7 @@
             default:
                 {
                     dmMsg(4, "Unknown chunk ID '%s', size %d\n",
-                        dmGetIFFChunkID(&chunk), chunk.size);
+                        chunk.idStr, chunk.size);
 
                     if (dmfseek(fp, chunk.size, SEEK_CUR) != 0)
                     {