fix: crash on using explicit

Author: boriel

src/api/symboltable/symboltable.py

@@ -335,7 +335,7 @@ def access_id(
         ignore_explicit_flag=False,
     ):
         """Access a symbol by its identifier and checks if it exists.
-        If not, it's supposed to be an implicit declared variable.
+        If not, it's supposed to be an implicitly declared variable.
 
         default_class is the class to use in case of an undeclared-implicit-accessed id
         """

src/zxbc/zxbparser.py

@@ -381,6 +381,9 @@ def make_call(id_: str, lineno: int, args: symbols.ARGLIST):
     This function will inspect the id_. If it is undeclared then
     id_ will be taken as a forwarded function.
     """
+    if args is None:
+        return None
+
     assert isinstance(args, symbols.ARGLIST)
 
     entry = SYMBOL_TABLE.access_call(id_, lineno)

tests/functional/zx48k/explicit_crash.bas

@@ -0,0 +1,13 @@
+REM when compiling with --explicit this should
+REM raise an error
+
+#pragma explicit=true
+
+DIM r(5, 5) As Ubyte
+DIM q as Ubyte
+
+for x = 1 to 5
+  for y = 1 to 5
+     q = r(y, x)
+  next
+next