cmake: fix bug with installation into OPENCV_LIB_INSTALL_PATH directory

cmake/OpenCVUtils.cmake

@@ -467,9 +467,10 @@ function(ocv_install_target)
 
       set(isArchive 0)
       set(isDst 0)
+      unset(__dst)
       foreach(e ${ARGN})
         if(isDst EQUAL 1)
-          set(DST "${e}")
+          set(__dst "${e}")
           break()
         endif()
         if(isArchive EQUAL 1 AND e STREQUAL "DESTINATION")
@@ -482,18 +483,20 @@ function(ocv_install_target)
         endif()
       endforeach()
 
-#      message(STATUS "Process ${__target} dst=${DST}...")
-      if(NOT DEFINED DST)
-        set(DST "OPENCV_LIB_INSTALL_PATH")
-      endif()
-
-      get_target_property(fname ${__target} LOCATION_DEBUG)
-      string(REPLACE ".lib" ".pdb" fname "${fname}")
-      install(FILES ${fname} DESTINATION ${DST} CONFIGURATIONS Debug)
+#      message(STATUS "Process ${__target} dst=${__dst}...")
+      if(DEFINED __dst)
+        get_target_property(fname ${__target} LOCATION_DEBUG)
+        if(fname MATCHES "\\.lib$")
+          string(REGEX REPLACE "\\.lib$" ".pdb" fname "${fname}")
+          install(FILES ${fname} DESTINATION ${__dst} CONFIGURATIONS Debug)
+        endif()
 
-      get_target_property(fname ${__target} LOCATION_RELEASE)
-      string(REPLACE ".lib" ".pdb" fname "${fname}")
-      install(FILES ${fname} DESTINATION ${DST} CONFIGURATIONS Release)
+        get_target_property(fname ${__target} LOCATION_RELEASE)
+        if(fname MATCHES "\\.lib$")
+          string(REGEX REPLACE "\\.lib$" ".pdb" fname "${fname}")
+          install(FILES ${fname} DESTINATION ${__dst} CONFIGURATIONS Release)
+        endif()
+      endif()
     endif()
   endif()
 endfunction()