After module, clear m_modp as not relevant any longer

src/V3Clean.cpp

@@ -155,6 +155,7 @@ private:
     virtual void visit(AstModule* nodep, AstNUser*) {
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstNodeUniop* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);

src/V3Clock.cpp

@@ -245,6 +245,7 @@ private:
 	m_modp = nodep;
 	m_stableNum = 0;
 	nodep->iterateChildren(*this);
+	m_modp= NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	//UINFO(4," SCOPE   "<<nodep<<endl);

src/V3Combine.cpp

@@ -407,6 +407,7 @@ private:
 	    nodep->iterateChildren(*this);
 	    m_state = STATE_IDLE;
 	}
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	m_funcp = nodep;

src/V3Depth.cpp

@@ -85,6 +85,7 @@ private:
 	m_modp = nodep;
 	m_funcp = NULL;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	m_funcp = nodep;

src/V3DepthBlock.cpp

@@ -77,6 +77,7 @@ private:
 	m_modp = nodep;
 	m_deepNum = 0;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	// We recurse into this.

src/V3Descope.cpp

@@ -177,6 +177,7 @@ private:
 	m_modFuncs.clear();
 	nodep->iterateChildren(*this);
 	makePublicFuncWrappers();
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	m_scopep = nodep;

src/V3EmitCSyms.cpp

@@ -78,6 +78,7 @@ class EmitCSyms : EmitCBaseVisitor {
 	nameCheck(nodep);
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	nameCheck(nodep);

src/V3EmitV.cpp

@@ -53,6 +53,7 @@ public:
 	putbs("module "+modClassName(nodep)+";\n");
 	nodep->iterateChildren(*this);
 	puts("endmodule\n");
+	m_modp = NULL;
     }
     virtual void visit(AstNodeFTask* nodep, AstNUser*) {
 	putbs(nodep->castTask() ? "task ":"function ");

src/V3Gate.cpp

@@ -316,6 +316,7 @@ private:
 	m_modp = nodep;
 	m_activeReducible = true;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	UINFO(4," SCOPE "<<nodep<<endl);

src/V3Inst.cpp

@@ -61,6 +61,7 @@ private:
 	//if (nodep->name() == "t_chg") m_debug = 9; else m_debug=0;
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCell* nodep, AstNUser*) {
 	UINFO(4,"  CELL   "<<nodep<<endl);

src/V3LinkLevel.cpp

@@ -47,6 +47,7 @@ private:
     virtual void visit(AstModule* nodep, AstNUser*) {
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCell* nodep, AstNUser*) {
 	// Track module depths, so can sort list from parent down to children

src/V3Order.cpp

@@ -461,6 +461,7 @@ private:
     virtual void visit(AstModule* nodep, AstNUser*) {
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	UINFO(4," SCOPE "<<nodep<<endl);

src/V3Premit.cpp

@@ -142,6 +142,7 @@ private:
 	m_modp = nodep;
 	m_funcp = NULL;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	m_funcp = nodep;

src/V3Unknown.cpp

@@ -70,6 +70,7 @@ private:
 	m_modp = nodep;
 	m_constXCvt = true;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCaseItem* nodep, AstNUser*) {
 	m_constXCvt = false;  // Avoid loosing the X's in casex