fix GCC 4.9 warnings

cmake/OpenCVCompilerOptions.cmake

@@ -95,6 +95,8 @@ if(CMAKE_COMPILER_IS_GNUCXX)
     add_extra_compiler_option(-Wno-narrowing)
     add_extra_compiler_option(-Wno-delete-non-virtual-dtor)
     add_extra_compiler_option(-Wno-unnamed-type-template-args)
+    add_extra_compiler_option(-Wno-array-bounds)
+    add_extra_compiler_option(-Wno-aggressive-loop-optimizations)
   endif()
   add_extra_compiler_option(-fdiagnostics-show-option)
 

modules/imgproc/test/test_distancetransform.cpp

@@ -166,10 +166,10 @@ cvTsDistTransform( const CvMat* _src, CvMat* _dst, int dist_type,
     int i, j, k;
     int width = _src->cols, height = _src->rows;
     const float init_val = 1e6;
-    float mask[3];
+    float mask[3] = { 0 };
     CvMat* temp;
-    int ofs[16];
+    int ofs[16] = { 0 };
-    float delta[16];
+    float delta[16] = { 0 };
     int tstep, count;
 
     assert( mask_size == 3 || mask_size == 5 );