[luci/lang] Fix exception throw for invalid data type (#16429)

This commit fixes a typo causing the exception not being thrown.

ONE-DCO-1.0-Signed-off-by: Arkadiusz Bokowy <a.bokowy@samsung.com>

Author: arkq

compiler/luci/lang/include/luci/IR/SparsityParam.h

@@ -77,7 +77,7 @@ class SparseIndexVector
         break;
       }
       default:
-        std::runtime_error("Invalid SparseIndexVectorType");
+        throw std::runtime_error("Invalid SparseIndexVectorType");
     }
   }
 
@@ -109,7 +109,7 @@ class SparseIndexVector
         break;
       }
       default:
-        std::runtime_error("Invalid SparseIndexVectorType");
+        throw std::runtime_error("Invalid SparseIndexVectorType");
     }
   }