[PMC] Fixed a compiler warning in ImageIO PMC's set_string_native VTA…

…BLE.

git-svn-id: https://svn.parrot.org/parrot/trunk@45483 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

src/pmc/imageio.pmc

@@ -612,11 +612,12 @@ Removes and returns a reference to a pmc from the start of the image.
     }
 
     VTABLE void set_string_native(STRING *image) {
+        PMC          *unused;
         const UINTVAL header_length = GROW_TO_16_BYTE_BOUNDARY(PACKFILE_HEADER_BYTES);
         int unpacked_length;
 
-        PARROT_IMAGEIO(SELF)->what          = VISIT_THAW_NORMAL;
-        PARROT_IMAGEIO(SELF)->buffer        = (Buffer *)image;
+        PARROT_IMAGEIO(SELF)->what   = VISIT_THAW_NORMAL;
+        PARROT_IMAGEIO(SELF)->buffer = (Buffer *)image;
 
         PARROT_ASSERT(image->_bufstart == image->strstart);
 
@@ -627,16 +628,14 @@ Removes and returns a reference to a pmc from the start of the image.
         unpacked_length = PackFile_unpack(interp, PARROT_IMAGEIO(SELF)->pf,
             GET_VISIT_CURSOR(SELF), PARROT_IMAGEIO(SELF)->input_length);
 
-        if (!unpacked_length) {
+        if (unpacked_length)
+            INC_VISIT_CURSOR(SELF, header_length);
+        else
             Parrot_ex_throw_from_c_args(interp, NULL,
                     EXCEPTION_INVALID_STRING_REPRESENTATION,
                     "PackFile header failed during unpack");
-        }
-        else {
-            INC_VISIT_CURSOR(SELF, header_length);
-        }
 
-        visit_todo_list_thaw(INTERP, SELF);
+        unused = visit_todo_list_thaw(INTERP, SELF);
         Parrot_visit_loop_visit(INTERP, SELF);
 
         /* we're done reading the image */