patch 8.2.1048: build failure without the eval feature

Problem:    Build failure without the eval feature.
Solution:   Add dummy typedef.
diff --git a/src/structs.h b/src/structs.h
index 3a9bbd3..0ac4864 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1794,6 +1794,10 @@
 {
     int	    dummy;
 } scriptitem_T;
+typedef struct
+{
+    int	    dummy;
+} evalarg_T;
 #endif
 
 // Struct passed between functions dealing with function call execution.
diff --git a/src/version.c b/src/version.c
index e383c18..4e2c553 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1048,
+/**/
     1047,
 /**/
     1046,