Fix "recovery" from parsing a syntactically incorrect constant declaration.

Author: compuphase

CMakeLists.txt

@@ -1,7 +1,7 @@
-#build file for CMake, see http://www.cmake.org/
-
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
-PROJECT(pawn)
-
-ADD_SUBDIRECTORY(./compiler)
-ADD_SUBDIRECTORY(./amx)
+#build file for CMake, see http://www.cmake.org/
+
+CMAKE_MINIMUM_REQUIRED(VERSION 3.0)
+PROJECT(pawn)
+
+ADD_SUBDIRECTORY(./compiler)
+ADD_SUBDIRECTORY(./amx)

compiler/sc1.c

@@ -5998,6 +5998,7 @@ SC_FUNC int constexpr(cell *val,int *tag,symbol **symptr)
   stgset(FALSE);        /* stop stage-buffering */
   if (ident!=iCONSTEXPR) {
     error(8);           /* must be constant expression */
+    litidx=0;           /* clear the literal pool */
     if (val!=NULL)
       *val=0;
     if (tag!=NULL)