patch 8.0.1581: cannot build Win32 GUI without +eval

Problem:    Cannot build Win32 GUI without +eval.
Solution:   Define HAVE_INPUT_METHOD without +eval. (Ken Takata)

Author: brammool

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1581,
 /**/
     1580,
 /**/

src/vim.h

@@ -2119,15 +2119,21 @@ typedef enum {
 #endif
 
 # if defined(FEAT_MBYTE) && defined(FEAT_EVAL) \
-	&& ((!defined(FEAT_GUI_W32) \
+	&& (!defined(FEAT_GUI_W32) \
 	     || !(defined(FEAT_MBYTE_IME) || defined(GLOBAL_IME))) \
-	     || (defined(MACOS_CONVERT) && !defined(FEAT_GUI_MAC)))
-/* Whether IME is supported by im_get_status() defined in mbyte.c. */
+	&& !defined(FEAT_GUI_MAC) \
+	&& !defined(MACOS_CONVERT)
+/* Whether IME is supported by im_get_status() defined in mbyte.c.
+ * For Win32 GUI it's in gui_w32.c when FEAT_MBYTE_IME or GLOBAL_IME is defined.
+ * for Mac it is in gui_mac.c for the GUI or in os_mac_conv.c when
+ * MACOS_CONVERT is defined. */
 # define IME_WITHOUT_XIM
 #endif
 
 #if defined(FEAT_MBYTE) && (defined(FEAT_XIM) \
 	|| defined(IME_WITHOUT_XIM) \
+	|| (defined(FEAT_GUI_W32) \
+	    && (defined(FEAT_MBYTE_IME) || defined(GLOBAL_IME))) \
 	|| defined(FEAT_GUI_MAC))
 /* im_set_active() is available */
 # define HAVE_INPUT_METHOD