functionVariableUsage: no longer SIGSEGVs on unfinished struct. Fixes Ticket #31.

src/checkother.cpp

@@ -896,6 +896,9 @@ void CheckOther::functionVariableUsage()
                     tok = tok->next();
                 }
                 while (tok && indentlevel > indentlevel0);
+
+                if (! tok)
+                    break;
             }
 
             if (Token::Match(tok, "[;{}] bool|char|short|int|long|float|double %var% ;|="))

test/testunusedvar.cpp

@@ -69,6 +69,7 @@ private:
         TEST_CASE(localvarStruct1);
         TEST_CASE(localvarStruct2);
         TEST_CASE(localvarStruct3);
+        TEST_CASE(localvarStruct4); // Ticket #31: sigsegv on incomplete struct
 
         TEST_CASE(localvarOp);          // Usage with arithmetic operators
         TEST_CASE(localvarInvert);      // Usage with inverted variable
@@ -275,6 +276,15 @@ private:
         ASSERT_EQUALS(std::string(""), errout.str());
     }
 
+    void localvarStruct4()
+    {
+        /* This must not SIGSEGV: */
+        functionVariableUsage("void foo()\n"
+                              "{\n"
+                              "    struct { \n");
+        errout.str();
+    }
+
 
 
     void localvarOp()