patch 8.2.3796: the funcexe_T struct members are not named consistently

Problem:    The funcexe_T struct members are not named consistently.
Solution:   Prefix "fe_" to all the members.
diff --git a/src/eval.c b/src/eval.c
index 64381f0..b2673dc 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -256,7 +256,7 @@
 	if (s == NULL || *s == NUL)
 	    return FAIL;
 	CLEAR_FIELD(funcexe);
-	funcexe.evaluate = TRUE;
+	funcexe.fe_evaluate = TRUE;
 	if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL)
 	    return FAIL;
     }
@@ -280,8 +280,8 @@
 	    if (s == NULL || *s == NUL)
 		return FAIL;
 	    CLEAR_FIELD(funcexe);
-	    funcexe.evaluate = TRUE;
-	    funcexe.partial = partial;
+	    funcexe.fe_evaluate = TRUE;
+	    funcexe.fe_partial = partial;
 	    if (call_func(s, -1, rettv, argc, argv, &funcexe) == FAIL)
 		return FAIL;
 	}
@@ -644,9 +644,9 @@
 
     rettv->v_type = VAR_UNKNOWN;		// clear_tv() uses this
     CLEAR_FIELD(funcexe);
-    funcexe.firstline = curwin->w_cursor.lnum;
-    funcexe.lastline = curwin->w_cursor.lnum;
-    funcexe.evaluate = TRUE;
+    funcexe.fe_firstline = curwin->w_cursor.lnum;
+    funcexe.fe_lastline = curwin->w_cursor.lnum;
+    funcexe.fe_evaluate = TRUE;
     ret = call_func(func, -1, rettv, argc, argv, &funcexe);
     if (ret == FAIL)
 	clear_tv(rettv);
@@ -2009,12 +2009,12 @@
 
 	// Invoke the function.
 	CLEAR_FIELD(funcexe);
-	funcexe.firstline = curwin->w_cursor.lnum;
-	funcexe.lastline = curwin->w_cursor.lnum;
-	funcexe.evaluate = evaluate;
-	funcexe.partial = partial;
-	funcexe.basetv = basetv;
-	funcexe.check_type = type;
+	funcexe.fe_firstline = curwin->w_cursor.lnum;
+	funcexe.fe_lastline = curwin->w_cursor.lnum;
+	funcexe.fe_evaluate = evaluate;
+	funcexe.fe_partial = partial;
+	funcexe.fe_basetv = basetv;
+	funcexe.fe_check_type = type;
 	funcexe.fe_found_var = found_var;
 	ret = get_func_tv(s, len, rettv, arg, evalarg, &funcexe);
     }
@@ -3805,12 +3805,12 @@
 	s = (char_u *)"";
 
     CLEAR_FIELD(funcexe);
-    funcexe.firstline = curwin->w_cursor.lnum;
-    funcexe.lastline = curwin->w_cursor.lnum;
-    funcexe.evaluate = evaluate;
-    funcexe.partial = pt;
-    funcexe.selfdict = selfdict;
-    funcexe.basetv = basetv;
+    funcexe.fe_firstline = curwin->w_cursor.lnum;
+    funcexe.fe_lastline = curwin->w_cursor.lnum;
+    funcexe.fe_evaluate = evaluate;
+    funcexe.fe_partial = pt;
+    funcexe.fe_selfdict = selfdict;
+    funcexe.fe_basetv = basetv;
     ret = get_func_tv(s, -1, rettv, arg, evalarg, &funcexe);
 
 theend: