parser: Fix compiler crash during error recovery for bad type() expressions

(02c411c regression)

Author: dkl

changelog.txt

@@ -57,6 +57,7 @@ Version 1.01.0
 - BLOAD now gives an error if it encounters a BMP file with an unknown header size
 - BLOAD was misreading bitfields in BMP files with undocumented BITMAPV3HEADER format (56-byte headers)
 - PRINT now disallows commas/newlines after SPC/TAB, instead of silently ignoring them
+- 0.90.0 regression: Compiler crash during error recovery for expressions like 'type<UDT>().field' where initializer values are missing
 
 
 Version 1.00.0 (former 0.91.0):

src/compiler/parser-expr-unary.bas

@@ -132,6 +132,8 @@ function cStrIdxOrMemberDeref _
 	dim as FBSYMBOL ptr subtype = any
 	dim as integer dtype = any
 
+	if( expr = NULL ) then exit function
+
 	dtype = astGetFullType( expr )
 	subtype = astGetSubType( expr )
 

tests/structs/anon-missing-initializer.bas

@@ -0,0 +1,9 @@
+' TEST_MODE : COMPILE_ONLY_FAIL
+
+type UDT
+	i as integer
+	j as integer
+end type
+
+'' Regression test: The missing initializer values shouldn't cause a compiler crash
+print type<UDT>().i, type<UDT>().j