Add missing include, and make GCC happy

src/codegen/dis.cpp

@@ -173,7 +173,7 @@ void PystonJITEventListener::NotifyObjectEmitted(const llvm::ObjectImage& Obj) {
 
     for (llvm::object::symbol_iterator I = Obj.begin_symbols(), E = Obj.end_symbols(); I != E;) {
         llvm::StringRef name;
-        uint64_t addr, size, offset;
+        uint64_t addr, size, offset=0;
         code = I->getName(name);
         assert(!code);
         code = I->getAddress(addr);

src/codegen/stackmaps.cpp

@@ -57,7 +57,7 @@ void StackmapJITEventListener::NotifyObjectEmitted(const llvm::ObjectImage& Obj)
         assert(!code);
 
         if (name == "__LLVM_StackMaps") {
-            uint64_t stackmap_offset;
+            uint64_t stackmap_offset = 0;
             code = I->getFileOffset(stackmap_offset);
             assert(!code);
             // code = I->getSize(stackmap_size);

src/core/ast.h

@@ -15,6 +15,8 @@
 #ifndef PYSTON_CORE_AST_H
 #define PYSTON_CORE_AST_H
 
+#include "core/common.h"
+
 #include <cassert>
 #include <cstdlib>
 #include <stdint.h>