Simplify "x = realloc (0, n);" to "x = malloc(n);"

lib/tokenize.cpp

@@ -4116,6 +4116,7 @@ bool Tokenizer::simplifyTokenList()
     }
 
     // simplify "x=realloc(y,0);" => "free(y); x=0;"..
+    // and "x = realloc (0, n);" => "x = malloc(n);"
     for (Token *tok = _tokens; tok; tok = tok->next())
     {
         if (Token::Match(tok, "; %var% = realloc ( %var% , 0 ) ;"))
@@ -4143,6 +4144,18 @@ bool Tokenizer::simplifyTokenList()
             tok->insertToken(varname);
             tok->next()->varId(varid);
         }
+        else if (Token::Match(tok, "; %var% = realloc ( 0 , %num% ) ;"))
+        {
+            const std::string varname(tok->next()->str());
+
+            tok = tok->tokAt(3);
+            // Change function name "realloc" to "malloc"
+            tok->str("malloc");
+
+            // delete "0 ,"
+            tok->next()->deleteNext();
+            tok->next()->deleteNext();
+        }
     }
 
     // Change initialisation of variable to assignment

test/testsimplifytokens.cpp

@@ -6004,6 +6004,10 @@ private:
     {
         ASSERT_EQUALS("; free ( p ) ; p = 0 ;",
                       tok("; p = realloc(p,0);"));
+        ASSERT_EQUALS("; p = malloc ( 100 ) ;",
+                      tok("; p = realloc(0, 100);"));
+        ASSERT_EQUALS("; p = malloc ( 0 ) ;",
+                      tok("; p = realloc(0, sizeof(char)*0);"));
     }
 
     void simplifyErrNoInWhile()