Fix a spurious error about types with pending variables used as function return values

Author: totalspectrum

Changelog.txt

@@ -1,5 +1,6 @@
 Version 6.1.8
 - Fixed multiple uses of LET in BASIC programs
+- Made sure class types are resolved when they are used as function returns
 - Made UTF-8 the default encoding for FatFS (configurable via FF_LFN_UNICODE)
 
 Version 6.1.7

functions.c

@@ -1057,7 +1057,8 @@ doDeclareFunction(AST *funcblock)
                 ERROR(funcdef, "Bad function declaration for %s", fdef->name);
                 fdef->overalltype->left = ast_type_generic;
             }
-            siz = TypeSize(fdef->overalltype->left);
+            // if the type has pending variables, resolve them
+            siz = CheckedTypeSize(fdef->overalltype->left);
             if (TypeGoesOnStack(fdef->overalltype->left)) {
                 fdef->numresults = 1; // will return a pointer
             } else {