Fixed a lot of issues reported by cppcheck 1.78

rtengine/iimage.h

@@ -376,6 +376,9 @@ public:
                     v(y, x) = tmp;
                 }
             }
+#ifdef _OPENMP
+            static_cast<void>(bigImage); // to silence cppcheck warning
+#endif
         }
     }
 
@@ -460,6 +463,9 @@ public:
                 v(i, j) = v(i, x);
                 v(i, x) = temp;
             }
+#ifdef _OPENMP
+        static_cast<void>(bigImage); // to silence cppcheck warning
+#endif
     }
 
     void vflip ()
@@ -482,6 +488,9 @@ public:
                 v(i, j) = v(y, j);
                 v(y, j) = temp;
             }
+#ifdef _OPENMP
+        static_cast<void>(bigImage); // to silence cppcheck warning
+#endif
     }
 
     void calcHist(unsigned int *hist16)
@@ -790,6 +799,9 @@ public:
                     b(y, x) = tmp;
                 }
             }
+#ifdef _OPENMP
+            static_cast<void>(bigImage); // to silence cppcheck warning
+#endif
         }
     }
 
@@ -878,6 +890,9 @@ public:
                 b(i, j) = b(i, x);
                 b(i, x) = temp;
             }
+#ifdef _OPENMP
+        static_cast<void>(bigImage); // to silence cppcheck warning
+#endif
     }
 
     void vflip ()
@@ -908,6 +923,9 @@ public:
                 b(i, j) = b(y, j);
                 b(y, j) = tempB;
             }
+#ifdef _OPENMP
+        static_cast<void>(bigImage); // to silence cppcheck warning
+#endif
     }
 
     void calcGrayscaleHist(unsigned int *hist16)